It is my first direct +to do 还是doing,
It is my hobby+ to do还是doing
it is my job doing/ to do?
my job is to do 还是doing
it is fun to do 还是 doing?
It is an effective method to do还是to doing?
It is an effective approach to do还是to doing?
My hobby is ( ) 是填to do还是doing?
It is time for doing还是to do
it is better 后加to do还是doing
it is great fun +doing还是to do
it is spent ____填doing 还是to do.
it is a waste of time doing还是to do