Night-lights, as we know, are the eyes a mother leaves behind her to guard her children. So you can go to sleep ________ the night-lights on, if you are afraid of the dark.

A.at B.with C.in D.on

— Batteries called “white elephant” met its Waterloo in the market of Europe.

— Europeans won’t be interested in it. Because a white elephant means a thing that is useless, __________ it may cost a lot of money.

A.since B.unless C.if D.although

While reading the novel Harry Potter for the first time, take a dictionary with you. It is of great ____________ for you to get to the imaginative storyline and characters.

A.cost B.use C.price D.method

— ____________ will you get the offer from that university?

— In two weeks. I am waiting for the result.

A.How soon B.How long C.How much D.How often

Everyone makes mistakes during his or her life. The most important thing is not to ________ it.

A.reuse B.repeat C.record D.recycle

— What do you think of the environment here?

— Wonderful! of the land covered with trees and grass．

A.Two fifth; is

B.Two fifths; is

C.Two fifths; are

D.Two fifth; are

The Chinese dream is a great way to bring people together and _______ the rapid development of our motherland.

A.wait for B.leave for C.care for D.push for

The self-driving plane proves to be useful in many ways. __________ object it is!

A.How smart B.What a smart C.How boring D.What boring

—Could you tell me _____ you’d like me to pay you?

—You’ d belter use mobile payment. I don’t care _____ it is Alipay or WeChat Pay.

A.how; whether B.how; why

C.what; whether D.what; why

— There was too much rain in most areas of China this spring.

— It seems that El Nino(厄尔尼诺) _________ the bad weather. We must do something now.

A.had caused B.is causing C.will cause D.caused