The soldiers did what they did to rescue the survivors _______the danger of aftershock

A new library is being built ______ there was a playground.

Kate is new in Chengdu. Maybe she needs an ______ to find the places.

There is somebody knocking at the door.Who________ it be—I’m not sure. It ________ be a postman.

I helped Mary_____her bag from the ground and she said thanks to me.