John isn’t happy today. Let’s go and ____.—Good idea.

what do you think of the Chinese language today?—-Quite popular. It______ in communicating with other countries. More and more foreign friends are learning Chinese.

I _____ sooner but I didn’t know that they were waiting for me .

I don”t think it any use taking with him , you ____ as well leave him alone .

熟人之间见面时表示礼貌的常用语是_________