问题
选择题
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
答案：B
题目分析：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