题目

—I can’t find my purse anywhere. —You         have lost it while shopping. A.may             B.can         C.should             D.would   答案：A  may表达推测之意，意为“可能……”。  Many other planets in the universe haven’t got an ________ like that of the earth. So there isn’t any life on them.A. astronaut B. illness C. artist D. environment