It was the training _____ he had as a young man _____ made him such a good engineer.
| A．what ; that | B．that ; what |
| C．that ; which | D．which : that |
Had the governments and scientists not worked together，AIDS﹣related deaths _______ since their highest in 2005．（ ）
| A． |
had not fallen |
| B． |
would not fall |
| C． |
did not fall |
| D． |
would not have fallen |
When the time came to make the final decision for a course，I decided to apply for the one that ______my interest．（ ）
| A． |
limited |
B． |
reserved |
C． |
reflected |
D． |
spoiled |
A sudden stop can be a very frightening experience，______ if you are travelling at high speed．（ ）
| A． |
eventually |
B． |
strangely |
C． |
merely |
D． |
especially |
When their children lived far away from them，these old people felt ______from the world．（ ）
| A． |
carried away |
B． |
broken down |
| C． |
cut off |
D． |
brought up |
Scientists have advanced many theories about why human beings cry tears，none of ______ has been proved．（ ）
| A． |
whom |
B． |
which |
C． |
what |
D． |
that |