To make our dream come true, we are supposed to set goals then try our best to achieve them.

It’s always foggy these days in our city. That’s really terrible!— Yes, and I hope to plant trees. ______trees, ______ air pollution.

The reason _____ their failure you know is ______ they didn’t get fully prepared for the experiment.

The audience was _____ very young children so there was a lot of noise while the concert was going on.

When we _______the railway station, the train _______for 5 minutes．