_____ his guests coffee, the professor went to the kitchen.
A. Offer
B. Offered
C. Offering
D. Offers
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The conversation soon turned _____ complaints about stress in work and life.
A. on
B. into
C. off
D. in
complaint的动词形式为______.
A. complaints
B. complainted
C. complaint
D. complain
A group ______ graduates got together to visit their professor.
A. of
B. about
C. in
D. with
graduate的名词形式是______。
A. general
B. graduating
C. graduated
D. graduation