—Do you think playing cards is beneficial to our study?—No，if ________，it can help us kill time when we have nothing to do.

Some people would rather ride bikes as bike ridding has_________ of the trouble of taking buses.

I would appreciate ______ very much if you could change the plan a bit to make it more workable.

—Have you found your lost mobile phone? —No, I haven’t. But I bought ________ yesterday. 

The Spring Festival, a traditional Chinese festival, is celebrated in        Asian countries．