Wearing white can help people _______when they feel stressed.
–What do you often do ____ classes to relax yourself?–Listen to music.
We looked at each other ____ surprise when we heard a bird singing “Happy birthday to you”.
She will leave her homework ____ the teacher’s desk afterschool today.
–How do you learn English so well? –____ chatting with my uncle in America online.
–How do you travel to school every day? –I go ____ bus.