It is an effective method to do还是to doing?
It is an effective method to do还是to doing?
It is an effective approach to do还是to doing?
the method to do还是the method of doing?
the method of doing还是the method to do?
it is fun to do 还是 doing?
It is my hobby+ 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
is committed to do 还是to doing