―He hardly has any friends to play with , _____ he?―_______! That’s why he feels lonely from time to time.
Mr. White always expected his son _______________ an active part in the classes.
–_______________ does a CRH train run? –It runs up to more than 300 km an hour.
You shouldn’t keep a pet _______________ you have enough time to care for it.
___________ the young girl ___________ her parents take regular exercise in order to keep fit.
Generally speaking, a computer works _______________ a human brain.