During the wave of worldwide economic crisis,lots of people are out of work,joining the ranks of unemployed.
| A．the;/ | B．the;the | C．/;an | D．/;the |
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 |
The program, __________ at improving the students' ability of listening and speaking, will surely be a success.
| A．to aim | B．aimed |
| C．to aiming | D．having aimed |
He didn't answer, with his gun __________ at David.
| A．aims | B．to aim |
| C．aiming | D．being aimed |