I. 语法、词汇。用适当的词填空。从A、B、C、D四个选项中，选出一个正确答案，并填在答题纸相应的位置上。（本大题共25小题，每小题1分，共25分）
Complete each of the following sentences with the most likely answer. (25 points)
1．Much ______ been said about the problem but nothing ______ been done so far.
A．has, had B．has, has
C．had, had D．have, have
2．I was advised to arrange for insurance ______ I needed medical treatment.
A．nevertheless B．although
C．in case D．so that
3．Half an hour after the police surrounded ______ hiding place, the gang ______ arrested.
A．its, was B．its, were
C．their, was D．their, were
4．Government reports, examination compositions, legal documents and most business letters are the main situations ______ formal language is used.
A．in which B．on which
C．in that D．at what
5．Someone turned the radio down, ______?
A．did he B．did they
C．didn’t he D．didn’t she
