No one knows exactly when our ancestors started talking，but new evidence suggests _______might have happened a long time ago．
| A．which | B．what | C．it | D．they |
We’re getting on very well with each other and ___ our room with him.
| A．living | B．sleeping | C．sharing | D．sitting |
The doctor __ my father not to smoke again.
| A．allowed for | B．let | C．advised | D．made |
Please ___ your new watch, or you’ll get it lost.
| A．look for | B．look after | C．look up | D．look through |
You should ___ the lights if there is no one in the room.
| A．turn out | B．turn off | C．go back | D．go on |
Save water as ___ as we can.
| A．much | B．more | C．little | D．less |