In today’s fast changing and competitive world, to be able to learn faster and more effectively is not merely desirable; it is ________.

So much homework and so many after-school activities really make the students feel _______. That’s why we should lighten the burden(减负) on students.

I didn’t buy the book because the seller wanted money than I had expected.

The pay phone is _____Green Street and it’s across ______ the library.

Do you know when Jim’s coming—He _____ 9:00 am