Task : Choose the correct prepositions. Write A, B, C or D on the answer sheet. (0.4pt)
1. He admitted having opened the suitcase ______asking the owner.
A. with B. without C. to D. for
2. Most bears hibernate _______ the winter.
A. at B. on C. in D. after
1D
2C
bạn giải thích đáp án giúp mình với ạ