[语言知识练习固基础]
Ⅰ.单句语法填空
1．On your arrival(arrive)，please give me an email.
2．With many green trees covering(cover) the hill，the air here becomes fresher than before.
3．These results conflict with earlier findings.
4．I would appreciate it if you would turn the music down.
5．Soon two policemen came in a police car and arrested(arrest)him.
6．The number of employees has already decreased by twenty percent after the manager laid off them.
7．China's first aircraft carrier，measuring(measure)about 304 metres，was handed over to the PLA navy in 2012.
