Would you like _____________ water?[ ]
A. a pair of
B. a cup
C. a glass of
答案:C
--- ________ are your grandparents?
--- They’re very well.
A.Where
B.How
C.What
D.Who
生物的一生需要不断从外界获得_________维持生活,植物通过_______制造有机物,动物只能以__________或别的__________为食。