【题目】Have you ever waited for your bus for a very long time, _____ by two or more buses arriving together?

【题目】Patience is a quality _____ success feeds on itself.

【题目】What subject does the woman think less difficult?

【题目】Please don’t call me at the office ________ it’s really necessary.

【题目】Where does the conversation probably take place?

【题目】What does the woman mean?

【题目】What does the man prefer to do on Sundays?

【题目】You’d better write down the phone number of the restaurant for the future ________.

【题目】The radio set _____ last week has been out of order.

【题目】The old man has two sons, ______ are lawyers.