_______no doubt that a green campus plays an important role in the growth of students, both physically and mentally.
I think you can ______ money by yourself to buy a present for your mother.—OK. I’ll try. I’ll not let a penny waste.
The doctor ____ the crying baby but couldn’t find out what was wrong with it.
I don’t know if my uncle_______. If he______, I will be very happy.
It’s nice to see you again. What_________ since we last met?