—Shall I attend my friend's comingofage ceremony, Mum?—No, unless you see to ________ that you will be home before 10:00 P.M.
The Science Museum, ________ we visited during a recent trip to Britain, is one of London’s tourist attractions.
By nine o’clock, all the Olympic torch bearers had reached the top of Mount Qomolangma, _______appeared a rare rainbow soon.
Today, we’ll discuss a number of cases beginners of English fail to use the language properly.
After gradutation she reached a point in her careet she heeded to decion what to do.
By serving others, a person focuses on someone other than himself or herself, ___________ can be very eye-opening and rewarding.