Be sure to make the invitations sent to ____ has taken part in the competition.
| A．who | B．whom | C．whoever | D．whomever |
His whole school education __________ only 2 years because of his illness.
| A．added up | B．added up in |
| C．added up to | D．was added up |
Please __________ the money and I'm sure it will __________ more than 1, 000 Yuan.
| A．add; add up | B．add up; add up |
| C．add up; add up to | D．add to; add up |
The glass of water is too hot. I prefer some cold __________ water.
| A．boiled | B．boiling |
| C．to boil | D．having boiled |
Scientists have reached the disturbing conclusion __________ the amount of the solar energy reaching the Earth's surface has been gradually falling.
| A．that | B．why |
| C．whether | D．what |
Such a grammar mistake is __________ among the beginners of English study.
| A．normal | B．common |
| C．general | D．ordinary |