问题补充:
Choosing to visit the Shanghai Expo on a late afternoon can make you see two to three times as many of the most popular pavilions between 6 pm and closing time you hurry.
A. when
B. unless
C. where
D. if
答案:
A. when
B. unless
C. where
(答案→)D. if
解析:可联系答.案.网客服索取。