The work is really very difficult; _________ it’s very interesting.[ ]

I wonder if it is going to rain this Sunday.-If it _______ ,I’Il have to stay at home.[ ]

I like the story of Murder in a Country House better than________ of Unusual Weekend．—I agree. The actors act better than______ in Unusual Weekend

of the students in our classmoney to the quake-hit areas these days.

I do my homework _____ ten o’clock every night. [ ]