Excuse me.Could you wake me up when my friend______here-Of course.But we still don’t know when your friend____ here.

Unless______, this law will make life difficult for farmers.

g, _________ company my sister works, donated alarge amount of money this time.

In ____ accident _____ knowledge of first aid can make _____ real difference.

You’re coughing badly, Martin．Why not give up smoking?—- Give up smoking? Easier said than done, Amy．Once you _____ the habit of smoking, it is very hard for you to______．