Most whales must come up for air after several minutes, _______ a few can stay under water for an hour or more.
| A．while | B．or | C．for | D．so |
After the new technique was introduced，the factory produced ________ cars in 2011 as the year before.
| A．as twice many | B．as many twice | C．twice as many | D．twice many as |
Mr. Brown knows little Japanese，so he can't understand the ________ on the bottle of the pills.
| A．explanations | B．instructions |
| C．suggestions | D．introductions |
_______ successful docking of Shenzhou VIII with Tiangong-I means that China has managed to take ________ first important step to establish its own space station.
| A．/; / | B．A; a | C．The, a | D．The; the |
--Could I speak to Mr Brown?
-- ______ , I'1l go and see if he is in.
| A．Who are you | B．He isn't here | C．I'm sorry | D．Hold on, please |
The twins look the same. Mr Li find ______ hard to tell one from the other.
A it B them C her D that