The teacher is busy ____ teaching.
A. with
B. for
C. on
D. of
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The teacher is busy ____ correcting papers.
A. for
B. in
C. on
D. of
We left Xi' an _.___ a very hot summer afternoon.
A. on
B. in
C. during
D. by
She felt disappointed when she found out they had gone swimming____ her.
A. but
B. except
C. except for
D. without
His teacher was angry ____ him ____ his being late.
A. at,with
B. at,for
C. with,for
D. with,about