2.It is very 　　　　 (danger) to swim in the river alone.

3.　　　　 (protect) our environment is everyone’s duty.

4.　　　　 (if) you give the book back to me, I’ll tell my teacher to ask you for it.

5.We enjoy Mrs. Wang’s lessons because she usually makes her classes 　　　　 (live). 6.Don’t feel worried about your child. The whole class would be 　　　　 (friend) to their new classmate.

7.It’s very 　　　　 (help) to read some books about science.

8.She likes the children to read newspapers and books in the 　　　　 （read） room.

9.Jim does his homework much more 　　　　 (careful) than any other boy in his class.  10.Look! The students are 　　　　 (bad) hurt. Let’s take them to the hospital at once.