While _______ out of the window, I saw my father walking the dog in the garden.
| A．look | B．looking |
| C．looked | D．having looked |
If you ______ go, at least wait until the rain stops.
| A．can | B．must | C．should | D．would |
The reason for his success is ______ he worked very hard.
| A．why | B．that | C．whether | D．how |
He couldn’t ______ the fact that the money was found in his house.
| A．answer for | B．leave for | C．account for | D．care for |
.Allow children the space to voice their opinions,____ they are different from your own.
| A．until | B．even if | C．unless | D．as though |
You should be _________ of your ______ behaviour.
| A．shameful; ashamed | B．ashamed; shameful |
| C．guilty; shameful | D．sorry; shameful |