优质解答
1. You should decide on the best choice and mark the corresponding letter on the Answer Sheet with a single line through the centre. 这是官方的说法.
2. fill in the answer sheet. 口语的说法.
3. mark the corresponding letter on the answer sheet. 口语的说法.
1. You should decide on the best choice and mark the corresponding letter on the Answer Sheet with a single line through the centre. 这是官方的说法.
2. fill in the answer sheet. 口语的说法.
3. mark the corresponding letter on the answer sheet. 口语的说法.