The monument was built in honor of the explorer who was believed _____ the river.
#98927
A
to have discovered   
B
to have been discovered
C
to discover  
D
having been discovered
推荐题目
. Tony was very unhappy for _______ to the party.
#98419
A
having not been invited
B
not having invited
C
having not invited
D
not having been invited
He is used to        to his office in spite of bad weather.
#94234
A
to walk
B
walking
C
walked
D
has walked
 I'm busy now. I'm sorry I can't help ____ the flowers. 
#98051
A
watering
B
watered
C
waters
D
to water