By the time he leaves university, he ________ much work experience so long as he takes a part-time j

By the time he leaves university, he ________ much work experience so long as he takes a part-time job．

A.will have gained

B.has gained

C.may have gained

D.would gain

答案及解析： A

句意为：只要他做点兼职工作，等到他离开大学的时候他一定会获得很多工作经验。