【推荐1】People certainly have a variety of reasons for going back to school but one important thing to know is, no knowledge is ________ (use). (所给词的适当形式填空)

【推荐2】He found it useless ________ (argue) with her. (所给词的适当形式填空)

【推荐3】You shouldn't spend so much time on many ________(use) things.

【推荐1】Air pollution will get worse and this will be ________(harm) to people. （所给词的适当形式填空）

【推荐2】It was________ (surprise) that the shy girl stood up and answered the question in a firm voice. (所给词的适当形式填空)

【推荐3】单句填空
1. What about ______（go） out for a picnic with me tomorrow?
2. Neither my parents nor my younger sister ______（be） at home today.
3. The new-media industry attracts young and ______ （create） people.
4. People sometimes confuse salt ______ sugar because they are of the same color.
5. The trees along the lake ______ （reflect） in the water.
6. I’m sure you’ll have no trouble ______ （find） the mistakes.
7. A survey showed people were ______ （confuse） about what they should eat to stay healthy.
8. Have you asked ______ （you） what you really want?
9. I wonder ______ you would mind my borrowing your book.
10. Qualities and wisdom ______ （sculpt） overtime.
11. He didn’t finish his homework on time. That is ______ he was punished by the teacher.
12. The graduates may have ______（problem） in finding a job.
13. The fog is so heavy that the cars are ______（visible） even at a distance of 50 metres.
14. Your journal is one of the best places to reflect ______ your actions and performance.
15. Look ______! Don’t knock the vase over!

【推荐1】________ has been five years since I came to this city. (用适当的词填空)

【推荐2】It is a pity ________ we can’t find the guy who did it.

【推荐3】It’s kind ________ you to help the old woman.(用适当的词填空)