Trains stop here in order to _____ passengers only.
The drill in Antarctica dragged on slowly because of lack of money, equipment breakdowns, environmental_________ and severe cold.
. ---Where did the couple find their child? ---It was in the park_________ the family used to camp.
He stayed up too late every night, _____ to catch up with his classmates.
I like getting up very early in summer. The morning air is so good______.
I agree with most of what her lecture said, but I don’t agree with ____ she said.