Computers can do nothing．But once ______what to do, they show extraordinary power to do a great deal．
#96065
A
to program
B
being programmed
C
programmed
D
having programmed
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________ to overcome the difficulty，he works day and night．
#95399
A
Determined
B
Determining
C
To determine
D
To be determined
It is believed to _____ over by sandstorms from AD 200 to AD 400.
#88245
A
gradually cover
B
be gradually being covered
C
have been gradually covered
D
be gradually covered
_______ that he was in great danger, Eric walked deeper into the forest.
#93578
A
Not realized
B
Not to realize
C
Not realizing
D
Not to have realized
To our great surprise, the painting _______ should have won the prize.
#95699
A
considered being copied
B
considering to be copied
C
considering having been copied
D
considered to have been copied
________by a group of children，the old man was delighted.
#94521
A
To be surrounded
B
Surrounding
C
Surrounded
D
To be surrounding