单句语法填空
【小题1】Every possible method ____________ (use) to prevent the air pollution, but the sky is still not so clear as before.
【小题2】Within 10 years’ time, I believe you’ll be using technology that ____________ (nol invent) yet.
【小题3】How many new words ____________ (learn) by the students recently?
【小题4】Though she ____________ (warn) many times, I’m not sure if she can avoid such mistakes this time.
【小题5】The means of online shopping ____________ (accept) by most consumers in recent years.
【小题6】In the last few years, thousands of films ____________ (produce) all over the world.
【小题7】So far the book ____________ (read) twice, but he still can’t understand it.
【小题8】Great damage ____________ (cause) by storms which swept across the south of China this summer.