计算题:假设一区群有七个小区组成,试画出区群的结构。
参考答案:
—Do you want to see the film Harry Potter?
—I _______ it already. It's really wonderful. [ ]
A. saw
B. see
C. have seen
D. will see
We hope you _______ a happy holiday in Hong Kong.
A.to have
B.having
C.had
D.will have