-Are you sure you have to? It’s been so late. Make it another time?-I don’t know ________ I can do it if not now.
The manager was so satisfied with allI had doneshe gave me a promotion.
You have to wear a helmet and a life jacket for protection, just ___ you fall into the water.
Wuhan lies _____ the Changjiang River and the Han River meets.
nation uses nuclear weapons will engage the whole world in war.
You are asked to attend the meeting ______ in the hall this weekend.