________ made us very pleased was ________ the China Pavillion(中国国家馆) attracted a lot of visitors.
We have no idea at all __________.
_______is certain ______ the Normans conquered England in 1066 and then English changed.
Many years of hard work_______ his great success in the development of this new type of material.
Danby left word _______he would call again in the afternoon .
I was surprised by his words ,which made me recognized ______silly mistakes I had made .