题目内容：
Generally, you should avoid（）business over a meal until your host gives a signal.
(A) talk about
(B) talking about
(C) to talk about
(D) talked about
参考答案：
选择题：Generally, you should avoid（）business over a meal
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Generally, you should avoid（）business over a meal until your host gives a signal.
(A) talk about
(B) talking about
(C) to talk about
(D) talked about