问题

What are these— They are________.
A:a shelf
B:shelfs
C:shelves
D:shelf;
B:shelfs
C:shelves
D:shelf;
正确答案是:
同类题型
What do you think of Mrs Smith?—She is ______ as you could ever meet
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How he wishes he had grasped the opportunity to get the position; now he feels sadly his career lies
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