I am going to take part in the 800-meter race this Friday.–____.

不明飞行物的英文缩写是_______。

Ms Wang is an excellent teacher.________ in our class loves her.

I’m sorry I’m late but I had a ____ tyre. — Never mind. Just go to your seat. [ ]

Economy is booming, so it is hard for some of the firms to _____ enough labor , though their working conditions are rather good.