A.has done
B.has been doing
C.had done
D.would have done
第1题
— What’s your major?— _______
A、I take a course in literature.
B、I’m interested in medicine.
C、I’m thinking of taking the linguistics course
D、I take world history as my major.
第3题
The workers are busy _______ models for the exhibition(展览).
A、to make
B、with making
C、being making
D、making
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