No one knows exactly when our ancestors started talking，but new evidence suggests _______might have happened a long time ago．
#4852
A
which
B
what
C
it
D
they
推荐题目
The population of India has ______ quickly, because they don’t have a Family Planning policy like China.
#4711
A
extended
B
developed
C
expanded
D
spread
.What some teenagers don’t realize is ____ difficult life can be if they get addicted to drugs.
#4789
A
how
B
what
C
that
D
why
Rose asked Tom, “Did you see my purse?” Rose asked Tom ___.
#4658
A
whether that he had seen her purse
B
whether he had seen her purse
C
that whether he had seen her purse
D
that if he has seen her purse