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。
