As ______ child, Salk did not show any interest in ______ medicine or science in general．
| A．不填; 不填 | B．the; 不填 |
| C．a; 不填 | D．a; the |
Can those________at the back of the classroom hear me?
| A．seated | B．sit | C．seat | D．sat |
At the opening________of the school, our headmaster gave a short speech.
| A．ceremony | B．form | C．matter | D．event |
Sarah pretended to be cheerful，________nothing about the argument.
| A．says | B．said | C．to say | D．saying |
More highways have been built in China，________it much easier for people to travel from one place to another.
| A．making | B．made | C．to make | D．having made |
Our country will try to make greater progress in improving people's living conditions，________lowincome families.
| A．especially | B．absolutely | C．totally | D．extremely |