21. John said he would pay ________ second visit to China ________ next year.
A. the; / B. the; the C. a; the D. a; /
22. It’s very dangerous to be ____ to the SARS virus without any protection. A disclosed B uncover C affected D exposed
用戶名
密 碼
忘記密碼 新用戶注冊(cè)