I don’t think David could have done such a stupid thing last night, ____?
Only by seizing every possible_____ to practice can you possibly hope to improve your spoken English.
—Why do many people keep dogs as pets?—Because they are our ____ friends and they never desert their masters.
The survey ____ in our school last month shows that about three percent of the students are addicted to the Internet games.
You _____ read a book in the sun—it'll do harm to your eyes.
A fire broke out in the building at 7:30 on Tuesday morning, ____ in the death of a young girl.