—How can we reduce CO2 in our home? —It’s easy. off your TV or computers when you’re not using them, and you’ll greatly reduce it.
—Jessica is very bright and studies very hard _____. —No wonder she always gets the first place in the examination.
The two top students in Mr. Green’s class competed _____ each other for the highest marks.
It is no use ____ with that mean storekeeper, for he won’t cut down the price.
There is no doubt ____ John will come by bus.
The reason ____he was late was ____he had taken a wrong bus.