Researchers have invented _________ ears that look and act like the real ears, giving hope to patients missing all or part of their ears.
| A．technological | B．artificial |
| C．false | D．magical |
It was the first time in two years that I________ my youngest son face to face.
| A．have seen | B．had seen | C．saw | D．see |
With our knowledge _________ practice, we can make contributions to our society.
| A．to base on | B．basing on | C．based on | D．base on |
My sister_______ the League last month and she has decided to _______ the activity to help the aged next week.
| A．joined; join in | B．took part in; join | C．joined; attend | D．joined in; join in |
Life would be happier if we could only be born at the age of eighty and ________reach eighteen.
| A．entirely | B．gradually | C．finally | D．rapidly |
You’d better get the second-hand car ________ before you sell it.
| A．repaired | B．repair | C．repairing | D．in repair |