问题补充:
--Whos the man shaking hands with our headmaster?
--A scientist to give us a talk on the history of the Party.
A. is invited
B. invited
C. inviting
D. which is invited
答案:
A. is invited
(答案→)B. invited
C. inviting
D. which is invited
解析:可联系答.案.网客服索取。