11.He closed the door behind him and _____ it,as was his habit.

11.He closed the door behind him and _____ it,as was his habit.
a.locked b.unlocked c.lock d.unlock
12.Can’t you do something ______ to help improve the situation instead of complaining so much.
a.positive b.negative c.active d.passive
13.Doctors said that Johnson definitely needed _____ if he wanted to play football again.
a.surgeon b.surgery c.urgency d.urgent
14.He had ____ touch with Jane since college and was eager to see her again.
a.kept b.made c.lost d.got
15.Unless governments _____,the Earth’s atmosphere will continue to heat up.
a.play a role b.take action
c.take part in d.participant
16.The police _____ immediately when report came that two kids had been held up at gunpoint in a nearby building.
a.acted b.action c.reacted d.reaction
17.It is important that you _____ the truth that every situation is a choice.
a.understood b.have understood
c.understanding d.understand
18.It’s high time that we _____ getting the dinner ready.
a.started b.start c.to start d.starting
19._____ the Internet,today we can do all our Christmas shopping from home.
a.Due to b.Despite c.Because d.Thanks to
20.The patient even thought of suicide to ____ his family of the burden of his condition.
a.relieve b.realize c.review d.recover