题目内容
Ann is so careful that she always goes over her exercises to ________ there are no mistakes.
[ ]
A．look for
B．make sure
C．find out
D．think about
答案：B
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—What do you think of Ann?
—Ann is so careful that she always goes over her exercises to ______ there are no mistakes.
| A．look for | B．make sure | C．find out | D．think about |