＿＿＿used to be thought that the earth was square.
#16931
A
He
B
What
C
It
D
That
推荐题目
_____ is known to us all that the 2012 Olympic Games will take place in London．
#15849
A
It
B
Which
C
As
D
What
In the ceremony, our headmaster required students to improve our competitive awareness in modern society.
#16136
A
we
B
us
C
our
D
ours
______ would have been too embarrassed, but he walked right up and asked for her autograph.
#15343
A
Someone else
B
Anyone else
C
Someone
D
Anyone
What seems to be a simple idea always turns out _____ that is hard to put into practice．
#14806
A
the one
B
one
C
ones
D
another
If you don't build your dream, someone will hire you to build ________.
#14704
A
it
B
them
C
yours
D
theirs