He often helps the students _________he thinks are not quick at their studies.
Air pollution, together with littering, ____ many problems in our large industrial cities today.
His advice made me happy, but ____others angry.
____ the flight to Beijing will be delayed is ____ I’m especially worried about.
— We shall take the conditions into careful account ____ you have attached to this contract. — Thanks. Hope for further cooperation.
— I’ll be able to come to see your performance at 8:30 tomorrow evening. — I’m sorry, by then my performance ____ and I ____reporters in the meeting room.