=>
1. I am looking forward to seeing my old friends at the party.
-> look forward to Ving : mong đợi
2. After we had had lunch, we went to Bat Trang village to buy some souvenirs.
-> After QKHT, QKĐ
3. The villagers are trying to learn English so that they can communicate with foreign customers.
-> so that S V (chỉ mục đích -> để)
4. Althogh there are modern knitting machines, the artisans in my village like using traditional looms.
-> Although S V : mặc dù
5. Many children like to go to Bat Trang Ceramic village as they can make their own pottery there.
-> as ~ because
6. We have to follow more than ten stages so that we can make a simple conical hat.
-> so that S V 
7. The paintings are special since they are burned after worship.
-> since ~ because
8. Before we organize the trip, we'll have to phone you first.
-> Before : trước khi
9. While we were visiting an old building, they were going to a traditional market.
-> while QKTD : trong khi
10. they were cleaning their house. (Điền thêm sao cho phù hợp nghĩa)
11. We should use a dictionary to look up new words.
-> look up : tra cứu
12. The doctor told my father to give up smoking.
-> give up : từ bỏ