China ______ a lot of people moving to urban areas in the last 20 years. However, many migrants left their families behind.
| A．saw | B．sees | C．has seen | D．had seen |
We suggested ___ trees at the weekend.
| A．planted | B．plant | C．to plant | D．planting |
___ good idea!
| A．What | B．What a | C．How | D．How a |
I prefer ___ to ___.
| A．do; talk | B．doing; talking | C．do; talking | D．doing; talk |
I’ll go to bed as soon as my homework______.
| A．do | B．does | C．are done | D．is done |
Which do you like, the former or the ___.
| A．late | B．later | C．latter | D．latest |