In front of the farmhouse ______.
| A．lay a poor man | B．laid a poor man |
| C．a poor man lay | D．did a poor man lie |
This new kind of chemicals will help keep the air, soil and water________ from pollution.
| A．free | B．empty | C．loose | D．short |
---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 |