I don't have a partner to play table tennis with.Why ____ a sports club to practice a lot?该填什么?并告诉原因.

I don't have a partner to play table tennis with.Why ____ a sports club to practice a lot?该填什么?并告诉原因.
I don't have a partner to play table tennis with.Why ____ a sports club to practice a lot?
该填什么?并告诉原因.

I don't have a partner to play table tennis with.Why ____ a sports club to practice a lot?该填什么?并告诉原因.
not join
why not结构表示建议“为什么不.呢”