【单选题】The artist said that he hoped ___ drawing the picture soon.
【单选题】TCR、BCR可变区基因重排的机制是( )。
【简答题】23+(-17)+(+7)+(-13)=______.
【简答题】计算:23﹣17﹣(﹣7)+(﹣16).
【单选题】He said the picture ______________ by a famous professor.
【单选题】From what Mr. Collins said, we can know that he ______.
A.
had only an incomplete picture of what happened
B.
heard and saw nothing at all