Being exposed for a long time_____strong sunlight might seriously damage your skin.
| A．over | B．under | C．to | D．in |
---I have cleaned the room three times a day. Look, It is a mess again.
---! Wait until the children go to bed.
| A．How come | B．Why bother | C．So what | D．What for |
Not for a moment ______ sightseeing while in Europe.
| A．has he stopped | B．he stops | C．did he stop | D．he did stop |
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 |