Ⅰ.用括号内所给单词的适当形式填空
1．Jack ________ (not tell) about the matter yet.
2．The problem ________ (not solve) so far.
3．________ the cost of the project ________ (calculate)?
4．The land to the south of the Murray River ________ (already explore)．
5．The road ________ (finish) two weeks ago.
6．A new bridge ________ (build) over the river next year.
7．Up to now, 10 people buried in the mine ________ (rescue)．
8．So far 12 houses ________ (pull) down in the big storm.
9．I ________ (live) here since I was born.
10．He ________ (invite) to dinner yesterday evening.
