问题
f a treatment ________ delayed the disease by seven years were to be available, the number of sufferers would drop by 40% by the middle of the century.
A:where
B:when
C:why
D:that;
B:when
C:why
D:that;
正确答案是：
同类题型
Why don’t you choose the red tie—For me, it doesn’t ________ my shirt well.
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