We all sang high praise for the important part he ___________ in this match.
| A．played | B．did | C．had | D．took |
she was out of the room, he took a quick look at the papers on her desk.
| A．If | B．While | C．Though | D．Unless |
Visitors to the hills are greeted by signs them to look out.
| A．warn | B．to warn | C．warning | D．warned |
It is already well understood causes the global warming.
| A．what | B．when | C．that | D．how |
— Jim has gone to Britain to see a modern art exhibition.
— Oh, really? Do you know when he ?
| A．leaves | B．will leave | C．was leaving | D．left |
— She looks rather upset. She the exam.
— I guess so. It’s very difficult after all.
| A．must have failed | B．can fail |
| C．would have failed | D．should fail |