The little boy who got lost decided to remain _____ he was and waited for his dad．

I’ve got to go now. —Must you? I ______ you could stay for dinner with us tonight.

Is there a library in Gaochun? — Yes, a new library _______ and is now open to the public.

Bicycling is a good exercise;________ it does not pollute the air.

________ was telling a lie.