1. As we all know, J________ 1st is Children’s Day.

2. I’d love to go there with you, but I haven’t finished our task y________.

3. The air pollution will be more serious u________ each of us does something helpful to cut it down.

4. Only five minutes left, ________ (hurry) up!

5. People use too many plastic bags and throw them away, it is ________ (harm) to our environment.