问题补充:
For the last few days choking clouds of pollution have virtually the northeastern Chinese city of Harbin, forcing schools and the airport to close up.
A. held down B. came down
C. broken down D. shut down
答案:
答案:D
时间:2019-06-11 02:49:27
For the last few days choking clouds of pollution have virtually the northeastern Chinese city of Harbin, forcing schools and the airport to close up.
A. held down B. came down
C. broken down D. shut down
答案:D