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dangminhthi240902
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Nguyên tử X nặng gấp hai lần nguyên tử nitơ. Tính nguyên tử khối và cho biết X thuộc nguyên tố nào? Viết kí hiệu hóa học của nguyên tố đó.
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Bài 1: Điền vào chỗ trống với đáp án phù hợp nhất 1. She is talking about the author ……….. book is one of the best-sellers this year. A. which B. whose C. that D. who 2. The children, ……….. parents are famous teachers, are taught well. A. that B. whom C. whose D. their 3. The exercises which we are doing ……….. very easy. A. is B. has been C. are D. was 4. Was Neil Armstrong the first person ……….. foot on the moon? A. set B. setting C. to set D. who was set 5. My mother, ……….. everyone admires, is a famous teacher. A. where B. whom C. which D. whose 6. He bought all the books ……….. are needed for the next exam. A. which B. what C. those D. who 7. Do you know the boy ……….. we met at the party last week? A. which B. whose C. who is D. whom 8. The man ……….. next to me kept talking during the film, ……….. really annoyed me. A. having sat / that B. sitting / which C. to sit / what D. sitting / who 9. This is the village in ……….. my family and I have lived for over 20 years. A. which B. that C. whom D. where 10. The old building ……….. is in front of my house fell down. A. of which B. which C. whose D. whom

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