—What shall we do tonight ...

【答案】D
【答案解析】试题分析：
A.
Help
yourself
请自便，B.
It’s
a
deal成交，C.
No
problem没问题，D.
It’s
up
to
you由你决定，句意：--那么今晚我们该怎么做？--由你决定，你想怎样就怎样。所以选D。
考点：考查交际用语

扩展阅读：we shall never surrender ... shall we talk8bite ... what shall we do tonigt ... shall we go shopping ... what shouldn't we do ... he that tom had stolen ... shall we go without him ... let me have a look ... what shall we buy ...