问题

I ___________ to phone her all day, but whenver Iphone her, the line is engaged.

A:tried
B:had beentrying
C:have tried
D:have beentrying

正确答案是：

同类题型

Sorry，we don’t allow ________ in the lecture room.

下列各句中，表达得体的一句是

Come ______, everybody! Look at this _______, and you will find something terrific

My parents have lived in the town _________ their son was six years old.

My brother and I have____ her birthday party.[ ]