1. A thermometer is used to measure temperature. A barometer measures air pressure.
2. Daniel made many promises, but he had no intention of keeping them.
3. I always enjoyed mathematics in high school, so I decided to major in it in college.
4. Anna is in serious legal trouble, for she had no car insurance at the time of the accident.
5. Last night Martha had to study for a test, so she went to the library.
6. The ancient Egyptians had good dentists. Archaeologists have found mummies that had gold fillings in their teeth.
7. Both John and I had many errands to do yesterday. John had to go to the post office and the bookstore. I had to go to the post office, the travel agency, and the bank.
8. I did not like the leading actor, yet the movie was quite good on the whole.
9. The team of researchers has not finished compiling the statistics yet. Their work will not be made public until later.
10. We have nothing to fear, for our country is strong and united.
(Tư liệu tham khảo: Betty Schrampfer Azar . Understanding and Using English Grammar. 3rd ed.)

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