Chọn đáp án đúng nhất ( A, B, C ,hoặc D ) hoàn thành câu sau. 1. You’d------- go to the dentist’s before your toothache gets worse. A. ought B. should C. better D. rather 2. I------- the violin since I was a child. A. am playing B. has played C. was playing D. play 3. London’s population is -------- much as that of New York. A. so B. more C. most D. as 4. I always buy my clothes at ------ department store. A. the B. an C. a D O 5. ------- heavy winds, our plane had to make an emergency landind on a busy motorway. A. because B.since C. as D. because of 6. You should go to England ------ English. A. learn B. learning C. to learn D. learned.