— _______ does your father do?— He’s a doctor. He works at the Beijing Hospital.
A. Who
B. How
C. What
D. Which
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—How long have you studied here?—______________ two years. I’m used to the life here.
A. For
B. Since
C. In
D. By
—Which lesson are you looking at?—Lesson __________.
A. tens
B. Ten
C. tenth
D. Tenth
Betty bought three T-shits and ____ of them are red. Red is her favorite color.
A. either
B. both
C. none
D. all
He ran as fast as he could ______ he failed to get here on time.
A. and
B. but
C. or
D. so