The teacher asked me____________.
| A．when did I finish my work | B．when I finished my work |
| C．when I finish my work | D．when do I finish my work |
Let’s ________ these bottles into different boxes for different use.
| A．choose | B．drop |
| C．separate | D．produce |
It’s necessary _________ us _________ more trees in spring every year.
| A．of; to plant | B．for; to plant |
| C．of; planting | D．for; planting |
In Britain, people won’t touch you or push past you if you’re _________.
| A．in some ways | B．in their way |
| C．by the way | D．in different ways |
Three years has passed _________ they came to this school.
| A．since | B．for | C．when | D．before |
The house is made _________ bamboo and it is made _________ six rooms.
| A．up of; of | B．of; from |
| C．of; up of | D．from; of |