You cannot take back your words _________ they are out of your mouth.
| A．before | B．whether | C．once | D．while |
--- Don’t look down upon Bob. He has his own advantages.
--- Oh, yes. ____ others are weak , he is strong.
| A．When | B．Where | C．While | D．If |
The new machine, as is reported in the local newspaper, will work twice as fast, _____ greatly reducing costs.
| A．thus | B．anyhow | C．yet | D．even |
Last month, part of Southeast Asia was struck by floods, from ___ effects some people are still suffering.
| A．that | B．whose | C．what | D．those |
_____ to try his fortune abroad, he left for America.
| A．Having determined | B．Being determined |
| C．Determined | D．To determine |
Helen always helps her mother even though going to school ____ most of her day.
| A．takes up | B．makes up | C．saves up | D．puts up |