---“The door was open.”
---“It ________ open, I ______ it myself and the key was in my pocket.”
A. can’t be, locked B. mustn’t be, had locked
C. can’t have been, had locked D. mustn’t have been, locked
---May I speak to your manager Mr Williams at five o’clock tonight.
---I’m sorry. Mr. Williams ________ to a conference long before then.
A. will have gone B. had gone C. would have gone D. has gone
–I’d like some more bread.
–Sorry, there’s ______ left.
A. some B. none C. a little D. few
After a knock at the door, the child heard his mother’s voice him.
A. calling B. called C. being called D. to call
Alan is a careful driver，but he drives ______ of my friends.
A. more carefully B. the most careful
C. less carefully D. the least carefully
Leaves are found on all kinds of trees, but they differ greatly size and shape.
A．on B．from C．by D．in
