Paul made a nice cage ______ the little sick bird till it could fly.
The suspect admitted _______________ the chemical in the lab before he killed his roommate.
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.