Đề ôn luyện Olympic 30-4 môn Tiếng Anh TRƯỜNG THPT CHUYÊN MẠC ĐĨNH CHI TP HỒ CHÍ MINH Mã A291715

TRƯỜNG THPT CHUYÊN MẠC ĐĨNH CHI – TP HỒ CHÍ MINH II. WORD FORMATION PART 1: Complete each sentence, using the correct form of the word in parentheses. 1. This involved some…………..dealings with the chief of the police. (HAND) 2. Ensure your screen colors are not causing eye strain. Avoid fluorescent…………..screens. (COLOR) 3. You can travel from one end of the park to the other on a…………..railway. (MINIMIZE) 4. Mr. Madill stated that the…………..against him were unfounded. (ALLEGE) 5. The lingering war in the country has brought about nothing but the…………..effects of poverty and squalor. (HUMAN) 6. The…………..between blacks and whites are more and more common. (MARRY) 7. I don’t think Tom’s getting too much sleep lately. His. eyes are terribly………….. (BLEED) 8. He has unwavering belief in something unreal such as…………..forces. (NORMALITY). 9. …………..can be dangerously close to racism. (NATION) 10. The world champion was…………..by a younger Russian challenger. (THRONE) PART 2: Complete the passage with appropriate forms from the words given in the box.

KICK LEAVER LIKELIHOOD ECSTASY RELATION ADVENTUROUS NURTURE COUNT ATTEND REMARK

Over the years, there have been (COUNT) …………. fans of the classic Hanna-Barbera cartoon character Yogi Bear. The cartoon series enjoyed by young and old alike revolved mostly around the (ADVENTUROUS) ………….of this loveable bear and his (KICK) …………. Boo-Boo as they tried unsuccessfully to snag “pic-a-nic” baskets in the made-up land of Jellystone Park. It is not often that people think about where the ideas for these cartoon characters come from, which brings up an interesting point: do bears actually search for food (LEAVER) ………….in Picnic baskets and (ATTEND) …………. campsites?

(REMARK) ………….enough, bears have been known to seek out food from some (LIKELIHOOD) ………….sources, including picnic baskets, on top of their usual diet of berries, insects, and fish. Bears work throughout the summer and fall to build up fat stores so as to have energy enough to last them through their winter hibernations. (RELATION) …………. to this is their need to replenish their depleted reserves when they wake up in the spring. Food is generally scarce in the early spring, and consequently they will (ECSTASY) ………….indulge in any foods that are (NURTURE) ………….. This is the main reason for many incidents involving bears entering campsites in search of food. III. ERROR CORRECTION

The following passage contains 10 errors. Identify and correct them. 1 Many flowering plants woo insect pollinators and gently direct them to their most fertile blossoms by changing the colors of individual flowers from day to day. Through color cues, the plant signals for the insect that it would be better off visiting one flower on its bush than other. The particular hue tells the pollination that the flower is full of far more pollen than are 5 neighboring blooms. That nectar-rich flower also happens to be fertile and ready to disperse its

pollen or to receive pollen the insect has picked out from another flower. Plants do not have to spend precious resources remaining reservoirs of nectar in all their flowers. Thus, the colorcode communication system benefits both plants and insects.

For example, on the lantana, a flower starts out on the first day as yellow, when it is rich 10 with pollen and nectar. Influenced by an as-yet-unidentified environmental signal, the flower changes its color of triggering the production of the pigment anthromyacin. It turns orange on the second day and red on the third. By the third day, it has no pollen to offer insects and is no longer fertile. On any given lantana bush, only 10 to 15 percent of the blossoms are likely to be yellow and fertile. But in the tests measuring the response of butterflies, it’s discovered that 15 the insects visited the yellow flowers at least 100 times more than would be expected from the haphazard visitation. Experiments with paper flowers demonstrated that the butterflies-were