问题

Mr. Hall understands that _______ math has always been easy for him, it is not easy for the students.

A:unless
B:since
C:although
D:when

正确答案是：

同类题型

Does Mary know ____—Yes, she knows ____.

What on earth do you want?— I just want a common sport coat-nothing _____.[ ]

Do you like coffee or milk?—BothBut I prefer coffee _____ milk

Is this museum ________ they visited last month?

“What’s this in English” “_____.”