______ all of us who are here tonight, I would like to thank Mr. Smith for his speech.A．On

We must find a flat big enough______.A．for all of us to liveB．for all of us to live inC．to

______ are afraid of difficulties, and we are all determined.A．None of usB．Not all of usC．

Those of us who smoke should have______ lungs X-rayed regularly since we are all aware of

All of us are looking forward to _____ a trip to the Ming T ombs.A.makeB.makingC.to ma

－－ Excuse me，may I sit here ？－－ _____A.Yes，of course.B.Not at all.C.Thank you.D.Here y

一－ Here you are Sir.－－__________.A. Yes all