So difficult _____ it to adjust to an English-speaking environment that he determined to learn English hard.

Quzhou is a wonderful place,visitors come here every year.

What’s the weather like outside?—It’s raining heavily . You’d better not go out.

Don’t worry. There is ________ time left.

The more _____ you listen to the tape, the _____you’ll find it to understand. —I agree with you.[ ]