He will never give up the chance to go abroad for further education _____ the situation is.
| A．however | B．wherever | C．whenever | D．whatever |
At times the balance in nature is ______ , resulting in a number of possibly unforeseen effects.
| A．troubled | B．confused | C．disturbed | D．puzzled |
He _____the problem _____in his mind for a whole week before he did anything about it.
| A．switched; on | B．kicked; up | C．turned; over | D．took; on |
You _____only half the price ,how would the seller sell the jacket to you ?
| A．spent | B．paid | C．charged | D．offered |
In the cross-lake swimming race, a boat will be ____in case of an emergency.
| A．standing by | B．turning on | C．getting on | D．running on |
The teacher has a peculiar way of ______her student’s nervousness when then speak English.
| A．breaking down | B．going over | C．taking off | D．giving away |