I. VIẾT LẠI CÂU CÓ TỪ TRONG NGOẶC:
1. Thank you for helping me. (it)
2. Don't try to persuade her because there's no point in it. (There's)
3. To have a visa is essential if you intend to visit Canada. (It's)
4. The customer should receive the delivery by Friday.(received)
5. During the time we've been talking, my boss has handed me the file. (While)
6. As there was a mistake in the hotel booking, I had to find another hotel. (because of)
7. We must redecorate our building,before Christmas. (needs)
8. He can't get the job because he isn't qualified for it. (enough)
9. Many university students find it hard to communicate their ideas in writing. (have)
10.  Overseas teritary aducation is too expensive for most school leavers in Viet Nam. ( can't)