─Forty students in this classPlease tell me something about them.─OK, of them are exchange students，and all these twenty are local students.

When the man was trying to break into the bank, he was caught by the police________[ ]

Many people spoke highly of the plan at the meeting, but _______ I don’t think it is of much practical use.

Mr Green asks us to hand in our reports ______ we finish them.

Which of the two T-shirts will you take— I’ll take ________. One is for my brother and the other is for my cousin.