He hid himself behind the door _____ he still could see what would happen to his classmates.

I will go out for a walk if it _______ tomorrow.

The reason ______ he gave for not coming was ______ his mother wouldn’t allow him to.

Tom _______ up early. But now he gets up very late.

The Hotel Al Arab, ________ the first and only 7-star hotel in the world, was designed in the shape of a sail of 321 meters[ ]