It is said the cost of medical care today is ten times as ____ as it was ten years ago.

Can you play ping-pong?—No, I can’t. It’s_____.

English istoo difficult for me. I can’t learn it well.

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

She looks very sad. I want to help her, but I just don’t know ____ to do it.