The scientists ________ on the new medicine for two years. They will succeed in no time.
| A．work | B．are working | C．have worked | D．will work |
At least 300 million people are using QQ_____ by Ma Huateng to chat online.
| A．create | B．created | C．creating | D．creates |
---- I’m very tired these days because of studying for exams.
-----Why not _____ music. It can make you _____.
| A．listen to, relaxing | B．to listen to, relax | C．listening to, relax | D．listen to ,relax |
It’s kind ___________Simon to give us ________advice.
| A．of , so many | B．for, such a useful | C． of , such useful | D．for, so much |
.----Do you know ______ this dictionary belongs to?
-----Let me see. Oh, it’s ________.
A. who ; mine B, who; me C, whose; mine D. whose; me
_________ the people lost their lives in the traffic accident.
| A．Three hundred | B．Three hundred of |
| C．Three hundreds of | D．Hundred of |