— Why does he never pick up the waste paper on the ground?— Maybe because he thinks it’s beneath his to do so.
_______ you don’t have much experience in this field, why don’t you ask Professor Wang for advice?
Why ________ it rain on Sundays? We can’t go camping as planned. What a pity!
—Shall we have a smoke here? —No, we _____ because this is gas station and the worker is carrying some petrol.
I am decorating my office now. I _______ comfortably in my office at this time tomorrow.
—Linda, I have to stay at school and take some courses next month, how about you? —I ____ to Canada at this time next month since I have got the visa.