下列有机物命名正确的是 [ ]
A. 1,3,4-三甲苯
B. 2-甲基-2-氯丙烷
C. 2-甲基-1-丙醇
D. 2-甲基-3-丁炔
答案:B
The meeting has been _ until next Wednesday afternoon. [ ]
A. put off
B. put out
C. put on
D. put up