. animals are threatened ………. extinction. A. by B. of C. with D. to 12. This is a non-smoking room. You ………. smoke in here. A. mustn’t B. needn’t C. shouldn’t. differently from the rest. 1. A. conservation B. preserve C. reserve D. raise 2. A. travelled B.explored C. seperated D. named 3. A. habitats B. dunes C. species
Ngày tải lên: 30/11/2013, 11:11