He doesn’t know ________ they will plant trees on Saturday or not.

Xiao Ming practises his spoken English oncethere is a chance and that is_________ it takes to live his dream to be a goodguide．

Film has a much shorter history, especially when_such art forms as music and painting [ ]

Mike wants to know if ________ a picnic tomorrow.—- Yes. But if it ________, we will visit the museuminstead.

When the boy got his favourite bike, he was on topof the world.