It won’t be quite a long time ________ your son is back, so don’t be worried.
–English is becoming so important. –It’s true. Many university classes are taught in English _____ the native language is not English.
As he _____ in the river for five hours, the thief looked very pale and hopeless.
We have reached a stagewe will never give in.
Qingming Day is also a day ____ people whose parents are dead visit the cemetery.
We shouldn’t spend our money testing so many people, most of _____are healthy