Some countries are increasing their use of natural gas, and other forms of ______.
| A．source | B．energy | C．power | D．strength |
Has the doctor _______ called for?
| A．referred to being | B．referred to been |
| C．referring to being | D．referred to be |
Mr Smith has a lot of business______. I know by______ that this man cannot be trusted.
| A．experience; experience | B．experiences; experience |
| C．experience; experiences | D．experiences; experiences |
We _______ on this project for four hours. Let’s have a rest.
| A．are working | B．have been working |
| C．worked | D．had worked |
This dictionary is_______ to my translation, but that one is________.
| A．a great help ; of no use | B．very helpful; of no any use |
| C．great help; helpless | D．important; of few importance |
John is the tallest boy in the basketball team,_______ according to himself.
| A．five foot eight as tall as | B．as tall as five foot eight |
| C．as five foot eight tall as | D．as tall five foot eight as |