3.Professor Black had us ____ compositions every Friday.A.to write B.written C.write D.writing为什么答案是C?我选D4.My watch is broken; I must have it ______.A.repairing B.to be repaired C.to be repairing D.repaired为什么答案是D?不是

professor What is the color of Professor Black’s hair?Professor Merle White of The Mathematics department,Professor Leslie Black of Philosophy,and Jean Brown who worked in the university’s office,were lunching together.“Isn’t it remarkable,” observed 把两个句子合并成定语从句1.What's the address of the factory?We noticed the advertisement of the factory the other day.2.A professor is going to give us a speech this Friday afternoon.He has been working on environmental protection.3.He ha black black black black black “black black Black black black black black black black black