To make it more convenient for people to visit Taiwan, several _____air services fromthe mainland have come into use.
There aren’t many seats left for the concert; you had better make sure ____ two today.
Examination compositions, together with most business letters and government reports, are the main situations ____ formal language is used.
If you don’t keep the meat in the refrigerator on such a hot day, it may ____.
——The book isn’t easy for Jack to understand, is it? ——____. His foreign language is far better than expected.
Doing your homework is a sure way to improve your test scores, and this is especially true ____ it comes to classroom tests.