Mr. Li, I can’t understand everything in class.—Don’t worry! I’ll ________ the main points at the end.
.Lucy often gets up at_____ six fifteen. [ ]
Only when he returned _________ that the war had ended and the army had come back.
Do you often go to movies ______ your friends? [ ]
Who is the tallest boy?–It ______ be John. Because John is of medium height..