We finally managed to make the customers ______ of the quality of the vehicle.
| A．to convince | B．convincing | C．convince | D．convinced |
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 |
A person's __________ body temperature is about 37℃.
| A．ordinary | B．normal |
| C．common | D．usual |