问题
选择题
The boy was saved because the doctor arrived there _____ it was too late.
A．before
B．since
C．or
D．while
答案
答案：A
考查状语从句。因为医生及时到达久了那个男孩一命，根据题意，医生在太晚之前到达，也就是说及时到达。
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The boy was saved because the doctor arrived there _____ it was too late.
A．before
B．since
C．or
D．while
答案：A
考查状语从句。因为医生及时到达久了那个男孩一命，根据题意，医生在太晚之前到达，也就是说及时到达。