四级语法专项练习题 主谓一致

38. Potatoes, which are _______, are my favorites.

A)a vegetable B) vegetables C) the vegetable D)the vegetables

39. Many species of animals which once lived on the earth ______ no longer in existence.

A)is B)are C)was D)were. 答案

20 c 21 a 22 d 23 c 24 a 25 d 26 b 27 c 28 a 29 c 30 b 31 b 32 d 33 b 34 d 35 b 36 a 37 b 38 a 39 b