Last week the students did the experiment in order to_______ if iron rusts in dry air．
| A．look for | B．look at | C．find out | D．find |
---Come in, please. This way. ______.
---Thanks. Oh, you have a nice place here.
---I’m glad you like it.
| A．Take it easy | B．Make yourself at home |
| C．Help yourself | D．How do you like it? |
All these changes will lead to a strong and powerful China, that can surprise the whole world.
| A．what | B．which | C．the one | D．one |
It was funny to see that the dog’s eyes immediately ________ at the sight of its owner.
| A．lit up | B．fixed up | C．did up | D．turned up |
24. — I serve three meals every day and do almost everything for him, but he still fails me.
— I’m sorry to say that’s______ you are mistaken.
| A．how | B．what | C．where | D．which |
Having decided to rent a flat, we ___ contacting all the accommodation agencies in the city.
| A．set about | B．set down | C．set out | D．set up |