5.(4分)Life insurance, _______ available only to young, healthy persons, can now be obtained for old people. A. before B. after C. former D. previously

5.(4分)Life insurance, _______ available only to young, healthy persons, can now be obtained for old people.
A. before
B. after
C. former
D. previously

出自：兰州大学大学英语4

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