The time has come ______ we can make extensive use of nuclear energy．
#16112
A
when
B
which
C
since
D
while
推荐题目
The earth travels round the earth once every moth; ____ is known to everybody.
#16186
A
as
B
it
C
which
D
this
I wanted to buy a comic book , but there was in the bookshop.
#57454
A
nothing
B
none
C
anything
D
everything
This poem can remind of the good old days___ studied in this beautiful school.
#16255
A
whoever
B
whomever
C
no matter who
D
anyone
Believe it or not, no bread eaten by us is so sweet as ___________ earned by our own labour.
#15997
A
one
B
that
C
such
D
what