He was puzzled by this phenomenon. He began to try every approach _________ the best way of working it out.
#96968
A
known to find
B
knowing to find
C
known finding
D
knowing finding
推荐题目
The plan to be carried out next month needs________among the members of the labor union before________.
#91334
A
to discuss；carrying out
B
to be discussed；carried out
C
discussing；being carried out
D
discussed；to be carried out
These robbers are sure __________.
#97479
A
to punish
B
to be punishing
C
being punished
D
to be punished
With a lot of difficult problems_____， the newly-elected manager is in a dilemma.
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A
settled
B
settling
C
to settle
D
being settling
Peter hurried through dinner, changed into old clothes, _______ in the lab for three hours.
#96676
A
worked
B
working
C
and worked
D
to work
-----What’s happening? I feel the house _____. -----An earthquake!
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A
shake
B
to shake
C
shaking
D
shaken