5. Many buildings       (fall) down in the earthquake-hit area.

4. There will be robots       (talk) with us in the future.

3. It's difficult for a robot       (do) the same things as a person.

2. The elephants are in great        ( dangerous) ;people shouldn't kill them any longer.

1. Robots never get       (boring) when they are working.

5. It's d       to play football in the street.

4. It is i        to learn English well if you don't work hard.

3. We are a        middle school students. We should help with housework.

2. His father works in a car f        .

1. Although she is only six years old,she is a        to speak English well.