Do you want to be healthy? ______. Smiling can help you stay healthy.
—How long does it take you to go to the bus station? —______.
Sam has a bike. He ______ it to school every day.
For some students, it’s difficult ______ school.
—______ is it from your school to the train station? —Five kilometers.
My English teacher is very good. She is like my mother ______ me.