Taiyuan，a city in North China，was struck by a heavy snowfall last week，________serious traffic problems.
#95391
A
to face
B
faced
C
facing
D
having faced
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She pretended _______ me when I passed by.
#96334
A
having not seen
B
not seeing
C
to not see
D
not to see
The traditional approach ____ with complex problems is to break them down into smaller, more easily managed problems.
#96069
A
to dealing
B
in dealing
C
dealing
D
to deal
From the dates__________on the gold coin, we decided that it was made five hundred years ago.
#98673
A
marking
B
marked
C
to be marked
D
having been marked
I would appreciate________back this afternoon so that we can reach an immediate decision.
#88503
A
you to call
B
you call
C
your calling
D
you're calling
____ the workers’ working conditions, the boss will allow them to have a coffee break.
#95217
A
Improving
B
To improve
C
Having improved
D
Improved