Ex1: Khoanh tròn vào liên từ thích hợp để hoàn thành những câu phức dưới đây. 1. It will be a great fortune (if/unless) I can join upcoming carnival. 2. I will lend you my book (as long as/as soon as) you promise to keep it clean. 3. I will call you (as long as/as soon as) I arrive there. 4. (When/While) I came, Jim was having dinner. 5. Catherine was shocked (when/until) she found out the truth. 6. They have worked at this company (when/since) they graduated. 7. At 8 pm last night, I was doing my homework (when/while) my sister was playing with her toys. 8. (Before/After) I had eaten my breakfast, I went to school by bus. 9. (Although/Despite) Mary looks thinner than me, she is much stronger than me. 10. They didnt come to the party (since/as soon as) they were too busy. 11. You should bring your raincoat (unless/in case) it rains. 12.I didnt realize her new hair (when/until) she told me. 13.I wont accept this job (even if/if) the offer me high salary. 14.My father will buy me a book (even though/as long as) I pass the exam. 15.I like her (when/even though) shes annoying sometimes. Ex2: Điền những liên từ cho sẵn vào chỗ trống để hoàn thành những câu phức dưới đây. whereas unless x2 since before x2 if x2 even though while 1.______ Jame is my friend, I cant accept his arrogance. 2. My brother is a bookworm, ____ I dont like reading books. 3. At midnight, my parents were sleeping_ ____ I was cramming for exams. 4._____ you have any questions, you ask me after the lesson. 5. We wont go camping_____ the weather is fine. 6. You shouldnt skip classes_____ you really have to. 7. What did you do_____ you went to bed last night? 8. In some cultures, you have to pray_____ you eat. 9. We are very familiar with this areas_____ we moved here 15 years ago. 10._____ you travel from the North to the South of Vietnam, you will experience many interesting customs. Ex3: Viết lại hai câu đơn thành một câu phức. 1. Dog is my favorite animal. They are good companions of people. 2. I dont like jazz . A friend of mine is a fan of it. 3. They were stuck in the traffic for hours. They managed to get there on time. 4. I came to the party. Everyone was leaving. 5. This time Jane works very hard . She doesnt want to fail the exam again. 6. I seldom do exercises. I doing exercises is good for health. 7. My computer is old-fashioned. It functions very smoothly. 8. I didnt know her real name. People always called her by her nickname. Ex41: Điền liên từ thích hợp vào ô trống để hoàn thành những câu sau: 1.They havent eaten anything since the morning_____ they were too busy to eat. 2.James is very excited now_____ he is going abroad next month. 3. _____ it may be very challenging for you to do it, you can give it a try. 4.I was going home yesterday_____ I came across my old friend. 5. _____ you often an apology to Jane, she wont forgive you. 6_____ Mr.Smith doesnt like traditional folk songs, he rarely listen to them. 7.Will you hang out with your friends_____ will you reunite with your family on the Mid-Autumn festival? 8. _____ you want to visit a foreign country, you have to apply for a visa first. 9.Tony has lived in Vietnam for 2years, _____ he doesnt know much about the countries festival. 10.Normally our family prefers staying at home and having dinner together on weekends, _____ this week we want to do something else.