______ the cold, thin air and low oxygen levels also can cause mountain sickness.
| A．On behalf of | B．Apart from | C．In terms of | D．Except for |
Children growing up in a single parent family ______ to beaggressive and ill-tempered.
| A．try | B．tend | C．attempt | D．mean |
_____many times, he finally understood it.
| A．To be told | B．Telling | C．Having told | D．Having been told |
Every year _____ money and energy is spent on environment protection.
| A．large quantities of | B．a large number of |
| C．a large quantity of | D．a plenty of |
I am not appealing for myself. I am appealing ________ all the ordinary teachers.
| A．on behalf of | B．in the opinion of | C．with a view of | D．in terms of |
Nobody knows for sure what effect global warming has ___ our environment in the long term.
| A．of | B．with | C．for | D．on |