She________have been to your house. She doesn't know your address.
| A．mustn't |
| B．shouldn't |
| C．might not |
| D．can't |
Rather than ______ on a crowded bus, he always prefers _____ a bicycle.
| A．ride, ride | B．riding, ride | C．ride, to ride | D．to ride, riding |
He has devoted most of his time and energy _______ a cure for the disease.
| A．find | B．finding | C．to find | D．to finding |
The child asked his mother _______ go out to play tennis.
| A．that he could | B．if he could | C．if could he | D．that could he |
– Do you know the West Lake in Hangzhou?
– Yes, this is the third time that I ____ this beautiful city.
| A．visit | B．visited | C．have visited | D．had visited |
It was a really ________ experience. Afterwards everybody was very _________.
| A．frightening, shocking | B．frightened, shocking |
| C．frightening, shocked | D．frightened, shocked |