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 |
John, _______ university professor, is considered to be _______ success as ______ expert in the agriculture research.
| A．a; a; an | B．an; / ; an | C．the; /; an | D．a; the; an |
______ in London, the penniless American wandered on the pavement, ______ to find a job to make a living.
| A．Lost; hoped | B．Losing; hoped |
| C．Lost; hoping | D．Losing; hoping |
I don’t like noisy jazz._______, I enjoy light music, which sounds soft and gentle.
| A．As a result | B．In other words |
| C．In a way | D．On the contrary |
When you go outing with the children, you must see to ______that they are safe.
| A．them | B．everything | C．it | D．yourself |
The lazy boy _____there doing nothing all the afternoon, but he______ to his boss that he had finished what should be done.
| A．lay; lied | B．lied; lying | C．laid; lay | D．lying; laid |