You should apologize  ____ your teacher ______ being late again. 
#26317
A
to; for
B
for; to
C
/; for
D
to; to
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______I used to go mountain—climbing every summer .
#28699
A
at a time
B
at one time
C
At times
D
At the same time
--Tom is very stupid. He fails in every exam. --_____, he is more lazy than stupid.        
#27336
A
On the other hand
B
On one condition
C
In my opinion
D
In other words