Planes will be very large______ flying will be verycheap.

ngs have become an inescapable part of the reputation of universities, _________them to attract students, staff and research investment.

What is the population of America — I don’t know. But I know it’s than that of China.

I’m beginning to regret that I ______ the job, for I’m working overtime every evening.[ ]

ou meet some trouble about how to usethis new kind of machine, you canthe instruction