1. Walking down the street, she noticed a long _____ of houses, all exactly alike.

A. queue       B. rank       C. train        D. row

2. The president has told his friends that he is sick but will not admit it _____.

A. in private     B. in secret     C. in public    D. in detail

__ I do not know  what I ___________ without the suitcase you lent me.

__ Glad to have been of some help to you.

A．would have done

B．would do

C．should have done

D．should do