______ their service, the workers of the hotel are active in learning English.
#91829
A
Improving
B
To improve
C
Improve
D
Having improved
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_________ good, the fried chicken was soon sold out.
#91585
A
Tasted
B
Being tasted
C
Tasting
D
Having tasted
____ his telephone number, she had some difficulty getting in touch with Bill.
#97339
A
Not knowing
B
Knowing not
C
Not having known
D
Having not known