----- Perhaps John’s not in.
-----_______. Look, the light’s on.
| A．Yes, he can be at home. | B．No, he couldn’t go out. |
| C．Yes, he must be at home. | D．No, he needn’t go out. |
At the railway station, the mother waved goodbye to her daughter until the train was _______.
| A．out of sight | B．out of reach | C．out of order | D．out of place |
We have no idea at all __________.
| A．where he has gone | B．where did he go |
| C．which place has he gone | D．where has he gone |
_______is certain ______ the Normans conquered England in 1066 and then English changed.
| A．That; that | B．It; what | C．That; what | D．It; that |
Many years of hard work_______ his great success in the development of this new type of material.
| A．due to | B．thanks to | C．contributed to | D．looked into |
Danby left word _______he would call again in the afternoon .
| A．who | B．that | C．as | D．which |