24．Tom is now in our class but he oncein Westbrook High School for a term．A. has studiedB.

问题补充：

24．Tom is now in our class，but he oncein Westbrook High School for a term．

A. has studied

B. studied

C. had studied

D. Studies

答案：

A. has studied

(答案→)B. studied

C. had studied

D. Studies

解析：可联系答.案.网客服索取。