单项选择题
A.gale warning B.24 hours forecast C.synopsis D.storm warning
It takes about 12 seconds to reverse()full speed ahead(...
单项选择题It takes about 12 seconds to reverse()full speed ahead()speed astern.
A.at, to B.to, from C.from, to D.at ,from
It was essential that the application forms()back befor...
单项选择题It was essential that the application forms()back before the deadline.
A.must be sent B.be sent C.would be sent D.were sent
Jim is sorry()so impolite to your guest last Saturday.A...
单项选择题Jim is sorry()so impolite to your guest last Saturday.
A.to be B.being C.having been D.to have been