17. They don’t think advertisements are useful for our daily life, .
| A．aren’t they | B．are they | C．don’t they | D．do they |
Guilin is the most beautiful place _____people all over the world want to visit.
| A．where | B．which | C．what | D．that |
— Conductor, can I get to Market Street on this subway?
— Of course. It’s leaving. ___________, please
| A．Take your time | B．Mind your step | C．Look out | D．Walk slowly |
He is only too ready to help others, seldom, ____, refusing them when they turn to him.
| A．if never | B．if ever | C．if not | D．if any |
I’d rather you _______that now, than afterwards.
| A．know | B．to know | C．knowing | D．knew |
She is the only one among the ______ writers who _______ stories for children.
| A．woman; writes | B．women; write | C．women; writes | D．woman; write |