By now, the Blacks have lived here 20 years.

_ those past years, wecouldn’t help feeling sorry for our parents who never had a rest all the yearround

I hear you __________ your project at theend of last week.-–In fact, I __________ it by the end of lastmonth.

Guangzhou’s high school students have been_______to a lot of foreign cultures,.but they never forget their own.

We must ________ every chance we have to improve our communicating ability