When he was ten, Edison ___ a small lab of his own.
| A．set up | B．set off | C．set out | D．set in |
________ one of you breaks the window will have to pay for it.
| A．Whoever | B．Whatever |
| C．Whichever | D．wherever |
He will surely finish the job on timehe's left to do it in his own way．
| A．so that | B．so long as |
| C．in case | D．for fear that |
The little girl is walking along the beach, happy and joyful, ______ bending down to pick up a beautiful seashell.
A approximately B. regularly
C. obviouslyD. occasionally
Finding information in today’s world is easy. The ______ is how you can tell if the information you get is useful or not.
| A．knowledge | B．ability |
| C．competition | D．challenge |
You should book a train ticket_____ if you want to go home in time before the Spring Festival.
| A．in return | B．in advance |
| C．in place | D．in order |