. _____is known to us all is that the old scientist, for____ life was hard in the past,still works very hard in his eighties.
| A．As; whom | B．What; whom | C．It; whose | D．As; whose |
He realized she was crying ________ what he had sad.
| A．because | B．because of | C．as | D．since |
They said to us, “Are you afraid to leave this house ?”
They asked us ____ afraid to leave _____ house.
| A．that were we…this | B．that we were…that |
| C．if were we …this | D．if we were…that |
The number of people in their class _______51.
| A．is | B．are | C．does | D．has |
It was in New Zealand ______ Elizabeth first met Mr.Smith.
| A．that | B．how | C．which | D．when |
Autumn coming, the leaves have ________turned into brown color.
| A．frequently | B．gradually | C．exactly | D．regularly |