- Air_______ is one of the biggest problems in the world today- Yes. We must take action to make the air less_______.
It is impossible for ________little children to do ______much work in a short time. A so;so B so; such C such; such D such; so
Rather than _________ on a crowded bus, he always prefers __________ a bicycle.
I found ___________ hard to remember all the twelve star signs because they are difficult to pronounce(发音) and spell.
The gloves are _________, but I do not care a bit.
—Look, someone is coming. Guess who ____________. —Jack. He’s always on time.