I like colorof your tie. It is good match foryou shirt.

Which sign can you mostly see in the school library

__________ , some students tend to develop a range of unhealthy habits .

They lived underground, ________ they kept machines ________ so that the Eloi would be happy and well fed.

It doesn’t _____ to set off fireworks on holidays since the smog(雾霾) is so severe at present.