_______ is known to us all that the old scientist, for _______ life was hard in the past, still works hard in his eighties. 
#11894
A
It; whom
B
As; whose
C
As; whom
D
It; whose
推荐题目
It ________him that they were playing a trick on him.
#13907
A
occurred
B
came
C
hit
D
made
---- It is generally believed that teaching is __________it is a science.
#13927
A
an art much as
B
much as an art as
C
as an art much as
D
as much an art as
The plan _____ just because people were unwilling to cooperate.
#13020
A
broke up
B
broke down
C
broke away
D
broke off