---Are your workers(工人)?---No, .A. friend; they aren’tB. sister; they are C. grandparents; they aren’t
Li Lei is seen ___his homework every day.
Our English teacher told me to pay more attention my pronunciation.
Students ___ slippers when they are at school.
He used ___ on the right in China, but soon got used ___ on the left in England.
___ too much is bad for your health.