3.____ you _____ the text yet ? Yes, we ____ it two hours ago. A: A. Did…copy…did B: B. Have…copied…have C: C. Have…copied…did D: D. Did …copy…had

Both and heavy chain genes and κ light chain genes______. A: are found near each other on the same chromosome B: begin rearrangement by joining a V to a J region C: will have the extra J regions copied into the primary transcript D: with have the extra upstream VL regions copied into the primary transcript E: have two membrane-spanning exons at the 3’ end of each of the constant regions

In 1985, Steve Jobs was mad at Bill Gates who was considered to have copied Steve Jobs' software. A: 正确 B: 错误

I wonder if I （）time. If I （）time, I’ll go with you. A: have; have B: will have; will have C: have; will have D: will have; have

I have got a because of the bad weather.I have a cough.I have a runny nose.I have a stuffy nose.I have a low fever.I have a high fever.I have chills.I have been sneezing.

【单选题】When ____you ____ supper? A. have; had B. do, have C. did, have D. will have A. have; had B. do; have C. did; have D. will have

I have had supper.When ________ you _________ it? A: have; had B: do; have C: did; have D: will; have

You are very tired. ________ a rest. A: Not have B: Do not have C: Be have D: Have

It is essential that he ____ (have) all the facts. A: have B: had C: will have D: were to have

______ a sports meet last Sunday Yes, they ______. A: Did they have; did B: B. Do they have; have C: Had they; had D: Have they; have