—Would you like me to help you with the maths problem?
—___________ It’s a most difficult one.
| A．With pleasure. | B．Why not? |
| C．That’s all right. | D．It’s my pleasure. |
____________ all his hard work, he still failed to finish the task in time.
| A．Although | B．Even if | C．Even after | D．So long as |
It is because he ___________ science that I __________ what he says.
| A．believes in; believe | B．believes; believe in |
| C．believes; believe | D．believes in; believe in |
Mr. Smith graduated from college at the age of 23, and ___________ he has been working as a teacher in a middle school.
| A．after that | B．from then on | C．from then | D．since then |
While crossing the street, an old man was knocked down by a car and badly __________.
| A．wounded | B．ruined | C．injured | D．harmed |
They are just human creatures in a human environment, trying to __________ themselves to a social situation.
| A．adopt | B．adapt | C．adjust | D．admit |