He paid 30% of the price for the house , and promised to pay by the end of the month.
| A．those | B．the others | C．the rest | D．the other |
--- Remember, Dad, Thomas Edison got bad grades in school, too.
--- Stay in your room until you’ve _____ the electric lamp.
A invented B discovered C made D imagined
There isn’t much time_____ . shall we go now?
A leaving B to leave C being leftD left
____ he came back home that we knew what had happened .
| A．When it was | B．It was when | C．Was it when | D．When was it |
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 |
It was _____ he said _____ disappointed me at that time.
| A．what ; that | B．that ; that | C．what ; what | D．that ; what |