It's too hot in summer. Some people like to sleep with their windows __________.

A.open B.opened C.opening D.to open

Our home river, Yitong River used to __________ seriously, but now it's as clear as a mirror.

A.pollute B.polluting C.is polluted D.be polluted

__________ beautiful our city looks when the colorful lights on both sides of the streets come on!

A.What B.What a C.How D.How a

It's a pity that our outdoor activity has been __________ because of bad weather.

A.put off B.put out C.put up D.put away

The movie The Wandering Earth tells a science fiction story __________ only Chinese can think up.

A.what B.who C.which D.whom

Hong Kong-Zhuhai-Macao Bridge is much __________ than any other sea bridge in the world.

A.long B.longer C.longest D.the longest

The twins with their mother went to Mount Changbai. __________ of them were shocked by the beautiful view.

A.Both B.All C.Each D.Neither

It's the library! So you __________ know shouting is not allowed here.

A.can B.need C.must D.may

—Excuse me, I wonder __________.

—Wait a moment, please. Let me check it out.

A.when can Flight 5789 land on time B.when Flight 5789 can land on time

C.whether can Flight CA 5789 land on time D.if Flight CA 5789 can land on time

Everyone in our class is working hard and doing what we can __________ a good senior high.

A.enter B.to enter C.entering D.entered