Tom is very modest. He never ___________ before his friends.

There was no sign _______ they had died from diseases such as bird flu – the main worry in such cases. Among the theories was _______ a truck had collided（碰撞）with the crowd.

Shall we go to the sea animal show tomorrow —- ___________.

is the sacred duty of allthe doctors and nurses

Hi, Lucy. Your skirt is very nice.—____