— What shall we do tonight then?— whatever you want.A. Help yourself B. It's a dealC. No

问题补充：

— What shall we do tonight then?

— ， whatever you want.

A. Help yourself

B. Its a deal

C. No problem

D. Its up to you

答案：

A. Help yourself

B. Its a deal

C. No problem

(答案→)D. Its up to you

解析：考查交际用语。A随意（这里是用餐的时候用的）；B一言为定（用于交涉时）；C没问题(用于答应某事）D取决于你（用于询问意见回答）。句意：——那么我们今天晚上将做什么？——由你决定，你想做什么都行。故D正确。