Look! The man at the gate ____ be our headmaster. He is always standing there every morning.– No, it _____ be him. He is holding a meeting in the office now.

How delicious the coffee is!—That’s right. It will taste ______ with milk.

Reportedly, yesterday a group of American soldiers were walking along the road in Iraq when a bomb was _______, three of whom were killed．

She has a lot of hobbies, ____playing chess _____ canoeing.

Several years ago, very ______ people knew Yao Ming .But now he is well-known all over the world.