Ответ:

2. A football isn't as heavy as discuss.

3. Watching TV isn't as interesting as surfing the net.

4. My mum isn't as tall as my aunt.

5. Germany isn't as big as Russia.

6. A tennis ball isn't as big as a basketball ball.

7. Riding a horse isn't as easy as riding a bike.

2. If you run faster you'll get to the station in time.

3. The children were playing happily on the beach.

4. Don't eat your food too quickly - you'll make yourself sick.

5. I can't hear you. Can you speak a bit louder, please?