When Peter speaks in public, he always has trouble _ the right things to say.
| A．thinking of | B．to think of | C．thought of | D．think of . |
Things have changed a lot ____ I wrote to you last time.
| A．when | B．since | C．as | D．before |
There were a lot of people standing at the door and the small girl couldn’t get _______.
| A．between | B．through | C．across | D．beyond |
___ he came to study in the university, he has made much progress in the study of English.
| A．While | B．When | C．Since | D．After |
He suddenly saw Sue _____ the room. He pushed his way ____ the crowd of people to get to her.
| A．across, across | B．over, through | C．over, into | D．across, through |
I'll come and see you _____ I go to the countryside.
| A．while | B．when . | C．as soon as | D．before |