He will _______ you next week if he is free.
| A．drop in | B．drop in at | C．drop in on | D．call at |
He ______be lazy, but he can work hard when he feels like it．
| A．may | B．will | C．should | D．must |
It was early morning in London _____ Prime Minister Cameron arrived to give his speech.
| A．where | B．when | C．while | D．that |
Many people are taking part in various outdoor activities ______themselves.
| A．refreshed | B．to refresh | C．being refreshed | D．having been refreshed |
At the end of the race his legs ____ and he fell down on the ground.
| A．gave out | B．gave off | C．worn out | D．used up |
I can’t remember when ______ turning point occurred exactly, but it might be ______summer morning when I was in New York.
| A．不填；a | B．a; a | C．the; a | D．a; the |