The last thirty years _________ the quick development in almost every field in China.
| A．have searched | B．have released | C．have seen | D．have determined |
If there is a lot of work _________．I’m happy to just keep on until it is finished．
| A．to do | B．to be doing |
| C．done | D．doing |
To learn English well, we should find opportunities to hear English _________ as much as we can．
| A．speak | B．speaking |
| C．spoken | D．to speak |
If we have illegal immigrants _________ in，many local workers will lose their jobs．
| A．came | B．coming |
| C．to come | D．having come |
The director had her assistant ________ some hot dogs for the meeting．
| A．picked up | B．picks up |
| C．pick up | D．picking up |
Due to the heavy rain and flooding，ten million people have been forced _________ their homes．
| A．leaving | B．to leave |
| C．to be left | D．being left |