All reference books ________, he didn't find the key to the question.
#88808
A
being searched
B
searched
C
to be searched
D
were searched
The monument was built in honor of the explorer who was believed ________ the big river.
#88812
A
to have discovered
B
to have been discovered
C
to discover
D
having been discovered
We entered the café and sat down by the window, waiting ________.
#88823
A
to serve
B
to be served
C
serving
D
served
With so many exercises ________, the students are having a hard time.
#88824
A
finished
B
finishing
C
to finish
D
being finishing
Whom do you expect to have      ________  the baggage to the airport?
#88825
A
deliver
B
to deliver
C
delivered
D
delivering