The pupils were playing games in the classroom ________ a gunman entered and began shooting wildly at them.
Many kinds of animals and plants die _________ every year.
We should do something to _______ the plant ______ the cold weather.
I’d appreciate _______ if you would teach me how to use the computer.
John thinks it would be long ________ he is ready for his new job.
Perhaps I’m not quite fit for the job, but ________, please let me have a try.