He lost a valuable watch. But when I wanted to comfort him, he said, “_____”.

Health is very important to us. We should eat more vegetables and fruit ____ too much rich food.[ ]

Teenagers should learn to protect (保护) ______from all kinds of dangers.

The boy used to cause a lot of _________/’tr?bl / very much.

Liu Xiang runs _____ fast _____ no one can catch up with him. [ ]