We have done things we ought not to have done and ________ undone things we ought to have done.
| A．left | B．leave |
| C．will leave | D．leaving |
________ you kept your mobile phone on in such an important exam? It’s against the school regulation．
| A．How dare | B．How come | C．How about | D．What if |
He is a man of few words, but he ______ be talkative sometimes．
| A．shall | B．must | C．can | D．would |
“I’d like to express my thanks to those ____ help my husband would have been killed in the accident” said the woman on TV．
| A．who | B．with their |
| C．with whose | D．without whose |
There are many factors that _________ the popularity of the 3G cell phone．Higher speed of surfing the Internet is one．
| A．answer for | B．provide for |
| C．account for | D．apply for |
Though H1N1 is sweeping throughout the world, people are still looking forward ___ off the Carnival Parade．
| A．to calling | B．not tocalling | C．not to call | D．to not calling |