We play ________ the snow.[ ]
A. in
B. at
C. on
答案：A
如果盒里有8个白球，2个黄球，小明先摸一个，一定是白球．______．（判断对错）
Tom hasn’t come to work since last Friday. he have had an accident?
A．Must
B．Could
C．Should
D．Might
