The students,______ at the way the questions were put,did not know the answers to them.

The students,______ at the way the questions were put,did not know the answers to them.
1：The students,______ at the way the questions were put,did not know the answers to them.
a、surprised
b、their being surprised
c、they being surprised
d、them surprised
2：The project ______ by the end of this year will expand the city’s telephone network to cover 1,000,000 users.
a、accomplished
b、being accomplished
c、having been accomplished
d、to be accomplished
3：If the building project ______ by the end of this month is delayed,the construction company will be fined
a、being completed
b、is completed
c、to be completed
d、completed
4：______ by appearance,she is not so much of a beauty.
a、Judged
b、Judging
c、Being judged
d、To judge
5：I remember ______ his money three weeks ago.
a、returning
b、to return
c、having returned
d、returned