6.I didn’t know your telephone number; otherwise I______.
A. would have called B. would call
C. called D. should call
7. In the early morning my mother was in the kitchen ______breakfast for us.
A. prepared B. preparing
C. having prepared D. to have prepared
8.1 would have told him the answer had it been possible, but I ______ so busy then.
A. had been B．have been
C. was D. would be
9. Our company will _____ all the costs of the repairs.
A. spend B．take
C. bear D. make
10. A few minutes after the plane had taken off, it developed engine trouble and______.
A. crashed B. dashed
C. stopped D. blushed
