Yesterday Kitty’s teacher Mr Wu invited me ______ their school trip to the World Park.
–Do you mind if I turn on the TV? --________. My father is sleeping.
Betty will ring me up when she ________ in Beijing.
We don’t know ________ it next. Let’s go and ask Mr. Li.
I’m glad to find that many trees ________ in our city last year.
The more you smile, the ________ you will feel.