tìm và sửa lỗi sai 46. She wanted to know where had I bought that hat. A.wanted to B.where had i C. that D. hat 47. If you haven't found your car key, what would you have done? A.if B.havent found C.what would D. have done 48. I believable her, so I can tell her anything that she wants to know. A. believable B.so I C that D to know 49. This is a valuable book. You must look after it carefully and you needn't lose it. A . a B.must look C.carefully D needn't lose 50. Remember to take on your shoes when you are in a Japanese house. A.Remember B on C. are D. a