than ________on a crowded bus, he alwaysprefers _______a bicycle

pping into the room this morning, I wasastonished to find the floor covered with _______looked like tinyinsects

What will global warming(全球变暖) bring us Scientists have given us a clear list.

If　you＿＿the　bottle　and　cigarettes，you’ll　be　much　healthier．

Nanjing is an old city, which ___the Changjiang River