英语
试题 单项选择 1.e-mail,as well as telephone,_______an important part in daily communication. a.is playing b.have played c.are playing d.play 2.every possible means _______to prevent air pollution,but the sky is still not clear. a.is used b.are used c.has been used d.have been used 3.it was where there had been a theatre_______they built a new modern school. a.where b.in which c.that d.so 4.it was not until 1920 _______regular radio broadcasts began. a.while b.which c.that d.since 5.only in this way_______to make improvement in t
