Desertification，the name for ______ happens when farmable land is turned into desert，is a growing world problem.
#72906
A
which
B
where
C
what
D
How
推荐题目
Exactly ____they did when at last they reached the sea remains a complete mystery.
#70262
A
that
B
how
C
which
D
what
If you feel tired and sick of fat food, that is ______ you have to go to the hospital for medical examination.
#73982
A
why
B
whether
C
when
D
what
We’ve made it a rule that ___________ comes home first cooks supper for the whole family.
#70575
A
whichever
B
whatever
C
who
D
whoever
Thinking ______ you know_______ in fact you don’t is a terrible mistake.
#67852
A
that; that
B
what; what
C
that; what
D
what that
The book was written in 1946, the education system has witnessed great charges.
#71797
A
when
B
during which
C
since then
D
since when