---Are you going to Tom’s birthday party?
--- _______. I might have to work.
| A．It depends | B．Thank you | C．Never mind | D．Sounds great |
Only when he saw the test paper himself, ______ he had failed in the exam again.
| A．he believed | B．he had belived | C．did he believe | D．had he believe |
It is no good ______ the flowers to often, for a lillte water is enough for them.
| A．watering | B．to water | C．watered | D．waters |
_____ into English, the sentence was found to have an entirely different word order.
| A．Translating | B．To translate | C．Having translated | D．translated |
He was obliged to ______ the trade of shoemaker.
| A．take on | B．take in | C．take up | D．take down |
The government of the United States began at once to investigate the case ______ a lot of students were killed.
| A．that | B．when | C．where | D．why |