I was almost asleep last night when I suddenly heard someone _________ at the door.

When dealing with a ________ task, Alice always asks for help from people around her.

Helen is fond of light music, ________ her brother is keen on rock and roll.

I can＇t find the key to my office. I ________ have lost it on my way home.

Please note that I will be away from Boston next week, _______ you want to call me and discuss things.

Ever since I arrived here, I _________ in the dormitory because it is cheaper.

All the traveling _________ are paid by the company if you travel on business.

The new model of the car was put into production in 2007, ________ helped to provide another1400 jobs.

Rich as they were in forms, the speaker＇s ________ seemed unrelated to his speech.

This problem is____his ability and I don＇t think he can solve it.

All students are eager to know ________ they will pass the exam or not.