This ______ my first lime standing in front of so many people, I can’t help sweating．
| A．being | B．is | C．was | D．has been |
_______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 |
I was surprised by his words ,which made me recognized ______silly mistakes I had made .
| A．what | B．that | C．how | D．which |
_______was last night ______I read about the history of English.
| A．This ,when | B．It ,since | C．It .that | D．It ,before |