. In salad bars the waiter does not bring you salad. You have to____ yourself, usually to as much as you want.
| A．bring | B．serve | C．help | D．supply |
-- Come on, please give me some ideas about the project.
-- sorry, with so much work _____ my mind, I almost break down.
| A．filled | B．filling | C．to fill | D．being filled |
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 |