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
__________ 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
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
It's too hot in summer. Some people like to sleep with their windows __________.
A.open B.opened C.opening D.to open
It's really lucky that Peter won a great prize __________ a free journey to Japan.
A.except B.against C.without D.including
Tom made a model plane __________ he could help his friends learn science.
A.if B.so that C.because D.even if
