．No one knows exactly when our ancestors started talking，but new evidence suggests _______might have happened a long time ago．
#16908
A
which
B
what
C
it
D
they
推荐题目
Of all the methods they provided, ________ is of any help for solving the math problem.
#14728
A
none
B
no one
C
nothing
D
neither
______ the bikes are too old to ride. I’ll have got to get them ______.
#15057
A
Both; repaired
B
Neither; repaired
C
Either; to repaired
D
All; to repair
Various optional courses being available, we can choose ________ based on our own interest.
#15066
A
either
B
each
C
one
D
it
---- Did you go to the reading-room or the library a moment ago?------______
#16311
A
Neither
B
No, I didn’t
C
Yes, I did
D
You are right
The biggest cities in Canada only have about six million people while _______ in China are much larger.
#14912
A
these
B
those
C
ones
D
others