My sister is a little _____ . She doesn’t talk much.
It’s necessary _________ us _________ more trees in spring every year.
In Britain, people won’t touch you or push past you if you’re _________.
Three years has passed _________ they came to this school.
The house is made _________ bamboo and it is made _________ six rooms.
—You are late again. The class _________ for five minutes.—Sorry. There’s something wrong with my bike.