I always take something to read when I go to the doctor’s I have to wait.
A. in case
B. so that
C. in order
D. as if
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(答案→)A. in case
B. so that
C. in order
D. as if
解析：A. in case以防，B. so that为了，因此，C. in order为了，D. as if 好像，句意：当我看病的时候，我总是带一些东西看，以防要等待。所以选A。