Considering the time limits, we also provide CDs our students may prefer to study at home.
A. so that
B. so long as
C. in case
D. as if
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(答案→)A. so that
B. so long as
C. in case
D. as if
解析：考查连词：A. so that为了，那么，B. so long as 只要，C. in case以防，D. as if好像，句意：考虑到时间的限制，我们也提供CDs这样我们的学生可能更喜欢在家学习。选A。