Millions of people watched that first moon landing on television, their hearts in their mouths, aware of how difficult and dangerous an adventure it was, and what risks had to be ____. 
#97093
A
taken
B
take
C
to take
D
taking
推荐题目
The school required ____.
#98657
A
rebuilding
B
to be re uilt
C
to have rebuilt
D
rebuilt
When ______ to recite the text, he still kept _______. 
#91559
A
asked; silent
B
asking; still
C
being asked; quiet
D
asked; calm
The power station keeps the villages ______ with electricity.
#97421
A
supplied
B
to supply
C
supplying
D
having supplied