The traditional view is _______ we sleep because our brain is “programmed” to make us do so.
| A．when | B．why | C．whether | D．that |
I often thought of my childhood, I lived on a farm.
| A．who | B．when | C．where | D．which |
He always brings me a pretty gift ____ he comes to visit me.
| A．by the time | B．sometimes | C．every time | D．at times |
The general demanded that the soldiers at the village before 5 p.m. to
rescue the victims of the earthquake.
| A．will arrive | B．arrive | C．would arrive | D．arrived |
A working party(工作组) has been set up to ________ the problem.
| A．look through | B．look up | C．look into | D．look out |
You must get the work ___ before Friday.
| A．do | B．to do | C．doing | D．done |