问题补充:
Do you know how many people up to now?
A. have invited
B. have been invited
C. had invited
D. had been invited
答案:
A. have invited
(答案→)B. have been invited
C. had invited
D. had been invited
解析:up to now 直到现在,应用现在完成时,进一步分析many people和invite之间是被动关系,应用现在完成时的被动语态:have/has been done 本题大意,你知道,到现在为止,有多少人被邀请了吗?
考查点:现在完成时的被动语态