30. Rather than ______ that film, I would rather ______ at home. 
| A．to see; to stay | B．seeing; staying | C．see; stay | D．to see; stay |
Experts suggest that parents should let their child do tasks that he is physically and mentally capable of doing by himself, ______ will help to build a self-confident kid.
| A．that | B．who | C．which | D．what |
It’s recommended that our plan _____ until it was tested again.
| A．put off | B．be put off |
| C．should put off | D．would be put off |
The use of an alcohol breath test by the police greatly reduces the ____of drivers causing traffic accidents．
| A．possibility | B．pressure |
| C．preference | D．Production |
The couple give ________ attend their 50th wedding anniversary some gifts to share their happiness.
| A．whoever | B．whomever | C．whom | D．Who |
So touching_____ that I couldn’t hold my tears back when I heard it for the first time
| A．the song sounds | B．had the song sounded |
| C．the song sounded | D．did the song sound |