She has a gift for creating an atmosphere for herstudents ______ allows them to communicate freely with each other

Tom seems tobe familiar with London—Yes He ___________ here for threeyears It’s great for him to be back

There’s someoneknocking on the door Who _________ it be—It must be John He promised to be here at 8:00

My parents advise me in that river. It’s dangerous.

They will try their best in the Dragon Boat Racing_______ they may fail.