________ the arrival of the police, I would have been robbed by two masked men.
| A．Had it not been for | B．If it were not for |
| C．Had it been not for | D．If it would not be for |
I have heard from my father, is in American.
| A．which | B．that | C．from whom | D．who |
Swan Lake is a famous ballet(芭蕾) in four acts, ________ on a German fairy tale.
| A．basing | B．based | C．bases | D．to base |
He had no idea of how the climb would be _______ he was half way up the mountain.
| A．when | B．until | C．while | D．as |
—Would you like some more chicken?
—No, thanks. I am ______ a diet and try to ______weight.
| A．on; lose | B．on; put on | C．in; have | D．in; lose |
. Alien had to call a taxi because the box was _____ to carry all the way home.
| A．much too heavy | B．too much heavy |
| C．heavy too much | D．too heavy much |