— I phoned you yesterday morning. A girl answered, but I didn’t recognize the voice.
— Oh, it ____ my younger sister. She was in my room at that moment.
A. must have been B. should have been C. could have been D. may have been
The old woman who______in the deserted house alone for ten years has been settled in a nursing home now.
A. lived B. has lived C. had lived D. has been living
The new buyer identified a dozen new sources for the material, ___________ proved to be reliable．
A. most of them B. most of which C. most of whom D. most of those
_____ I say Clancy is a smart boy, he still needs to work hard to achieve his goal.
A. Then B. When C. While D. As
Unfortunately, ____ stone hit him on ______ head and he got injured.
A. the; a B. a; 不填 C. a; the D. the; the
____ to Anne's birthday party, Mr. Brown is now searching shop after shop for a nice present for her.
A. Having invited B. Having been invited C. Have been invited D. Being invited
