---Did you get to school on time yesterday?--- No. An unexpected heavy rain ______  the bus ______the station on time.

Once a year , people take part in “ ______ Lights ” activity to help save energy . 

       I felt it hard to keep up with my classmates. But whenever I want to ____________, my teacher always encourages me to work harder.

–How about the exhibition that day? --It was very noisy, but that didn’t ________ me.

 —____ your sister know Tom?        —No, she ____.