What’s the use of this kind of fuel(燃料) — It can make the train __________ fast.

China Shenzhou XI manned spacecraft (载人飞船）into space on October 17，2016.

Dad, John isn’t cool and burieshimself in jobs all day. I want to break up with him. —- Break up with such a niceman ________ . I don’t want to see you for ever.

How can I get more information about your activity—You can visit our ______ at www.tdxx.126@.com .

You can choose _____book you like in thelibrary.