It’s ________ unusual chance for Mr White to get such ________ useful advice.
I prefer books ________ are educational and interesting.A. that B. what C. who
—The flowers are beautiful. How do you look after them?—Well, this kind of flowers _________ every morning.A. should water B. waters C. must be watered
—How long have you been working in this city?—_______________.A. Five years ago. B. Since last year. C. After I left university.
Could you please _________here? It’s a no-smoking area.A. not smoke B. not to smoke C. don’t smoke
Do you think ______ amazing for Stephen Hawking to achieve so much as a disabled man?A. this B. that C. it