29.He was told that it would be at least three more months he could receover and retum to work.
(A)when
(B)before
(C)since
(D)that

本题考查连词before的用法。It will be +时间名词+ before表示“要过……久才……”，此处意为“至少要过三个月他才恢复健康并且重返岗位”。