-How much_______ the shoes?-Five dollars_______ enough.
School students ___smoke because it is against the school rules.
Some people ___feel sick when they read a book in a car or on a boat.
Cars, buses and bikes ___stop when the traffic lights change to red.
—Where___ you ___last night? —I went to the supermarket and bought a present for my younger sister.
I ___ an article about first aid. It’s useful in emergency situation.