Choose the right words to complete the short conversations.

Choose the correct option.

A: [Why|When|Who] don't we go to a cafe?

B: It's a good [unclear|idea|ideal].
A: What [for|about|with] watching a sitcom?

B: Count me [in|on|at]!
A: [How|How much|Why] about a pizza?

B: No, [things|thinks|thanks].