[跟踪训练]
在空格处填入适当的词(1个单词)或所给词的正确形式
1．The UN would play a major role in (monitor) a ceasefire(停火)．
2．Newspapers seized on the results as proof that (globe) warming wasn’t really happening.
3．They (launch) a new passenger ship three days ago.
4．The (calculate) was difficult，but we finally worked it out.
5．We are particularly grateful to him for his (time) help.
6．If you surf Internet，you spend time finding and looking at things on it.
7．I chatted his father for a while before I went to work this morning.
8．Please come whenever it is convenient you.
9．Think how rapidly medical knowledge has gone of date in recent years.
