The speed limit for bicycles on campus is 15 mph, ___________ otherwise posted.
| A．unless | B．until | C．since | D．however |
After the new technique was introduced, the factory produced _____ cars in 2010 as the year before.
| A．as twice many | B．as many twice | C．twice as many | D．twice many as |
_____ of her skirt is different _____ that of mine.
| A．A color; in | B．The color; with | C．A color; between | D．The color; from |
After he had said good-bye to Jack, Tom ______ a bus and left the town.
| A．got down | B．got on | C．got into | D．got off |
When I entered the classroom, I saw the students _____ in their seats.
| A．sitting | B．are sitting | C．sat | D．to sit |
I would really _____ it if you could offer me the chance to study abroad.
| A．thank | B．make | C．like | D．appreciate |