____his scientific work, he has no time to care for his family affairs, which his wife always complains about.
—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.
—I'll call you ______ I arrive in Shenzhen. —Thanks, and good luck.