Choose the best answer to complete the sentence.
1. Polluted water can directly do harm................people's health.
a. for b. on c. to d. over
2. There have been many changes around hereI was a boy.
a. during b. since c. while d. whern
3. Unless we................our water resources, there will be a shortage of clean someday
a. predict b. use d. replace c. conserve
4. The man...............wrote this book had a fascinating life.
a. who b. which c. whose d. whom
5. I have been working hard on my Englishit is not better.
a. but d. and b. So c. or
6. John drivesthan Peter does.
a. much carefully b. as carefully c. more carefully d. more careful
7. Jane together with her friends.............. our trip. have joinedd.
d. is going to join a. Join b. were joining c. have joined
8. ................you help me, I won't be able to finish my work on time.
b. Unless c. Since d. Although a.if
9. Peter suggested................ everything again
a. us to check b. we wll check c. us check d. we should check
10. "What a beautiful dress!" "............."
a. It's nice of you say so b. I bought it at Harod's Shop d. It doesn't cost much c. I'm glad to hear that