问题
选择题
I’m sorry to tell you it is nearly five months ___ smith got injured in the leg, but I think it won’t be long ____ he completely recovers.
A．after; when
B．before; since
C．that; when
D．since; before
答案
答案：D
考查固定句型。It is +一段时间+since 从句 （一般过去时） It won’t be long before +从句 （一般现在时）故答案为D。
