Not until the early years of the 19th century ________ what heat was.
| A．man did know | B．did man knew |
| C．didn't man know | D．did man know |
It is generally believed that teaching is _____ it is a science.
| A．an art much as | B．much an art as |
| C．as an art much as | D．as much an art as |
She made a note of it ______ she might forget.
| A．so that | B．in order that |
| C．if | D．in case |
He succeeded in solving all the problems _____.
| A．as expecting | B．that expected |
| C．than expecting | D．as expected |
It was ________ done _______ Marry jumped up with joy.
| A．so beautifully; that |
| B．such beautiful; that |
| C．such beautiful; as |
| D．so beautifully; as |
The teacher will give us an interesting talk _______ you said.
| A．as to | B．just as |
| C．just like | D．so that |