23. Individual exercise is easier to schedule, because a student can work whenever he or she is free,
________ an overall fitness goal is achieved.
(A) what
(B)which
(C)as long as
(D)as well as
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統計: A(57), B(146), C(505), D(211), E(0) #1458777
統計: A(57), B(146), C(505), D(211), E(0) #1458777