We heard someone________in the next room．
| A．singing | B．to sing |
| C．sang | D．sings |
I____some information on the Internet for my trip in the coming winter holiday.
| A．gave up | B．looked up | C．showed up | D．ended up |
--Has Tommy finished his project yet?
--Maybe not. He ___on it at lunch time. Let's go to have a look now.
| A．has worked | B．is working |
| C．was working | D．had worked |
--Is that Anna's car?
--It____be hers. She has just gone to the theater for the new opera.
| A．can't | B．mustn't | C．may | D．could |
Following the traffic rules can help us____ accidents.
| A．influence | B．repeat | C．produce | D．avoid |
Nowadays Wechat is____used by people for communicating, sharing, chatting, and so on.
| A．lastly | B．exactly | C．widely | D．nearly |