问题
选择题
—How many hours do they spend on their homework every day?
—_____. [ ]
A. Twice
B. Two
C. Once
D. Often
答案
答案：B
搜题请搜索小程序“爱下问搜题”
—How many hours do they spend on their homework every day?
—_____. [ ]
A. Twice
B. Two
C. Once
D. Often
答案：B
下列标点符号使用正确的一项是：（ ）