America's car industry will continue to break down some progress is made to close the gap.
| A．since | B．unless | C．because | D．though |
Everyone passed the exam.It _________ difficult.
| A．can’t have been | B．must have been | C．couldn’t be | D．might have been |
.Beginners of English can _________ quite well without learning any grammar rules.
| A．get along | B．get to know | C．get over | D．get through |
.The _________ look on his face suggested that he hadn’t expected _________ would happen.
| A．surprised;what | B．surprising;what | C．surprised;that | D．surprising;that |
There is no _________ that the Great Wall of China is one of the biggest man-made projects on the earth.
| A．time | B．doubt | C．matter | D．mind |
.They _________ in spite of the extremely difficult conditions.
| A．carried out | B．carried off | C．carried on | D．carried forward |