【題目】空氣污染變得越來越嚴重。

【題目】永遠不要忘記感恩你周邊的人。

【題目】近些年，我們學校發(fā)生了很大變化。

【題目】當我到家時，我意識到我的英語書忘在學校了。

【題目】My best friend, Tom gave us some most useful ____________ (suggest).

【題目】I’m sure most of the students will feel _______ (thank) to their teachers after they leave school.

【題目】Something must _________ (do )to stop the sale of shark fins.

【題目】The plan is not a new _________(discover), it’s been known for years.

【題目】I’m afraid he can’t afford ________ (wait) to go shopping.

【題目】Their house is very similar to __________ (our), but theirs is much smaller.