It never _____ humans until the mid1990s that some animals can be cloned.
#92718
A
occur
B
is occurred
C
occurred to
D
occurred
推荐题目
--Thank you very much.--Not at all , I was____________ glad to help.
#94985
A
too
B
only too
C
not so
D
much
_________, the more expensive the camera, the better its quality.
#95196
A
General speaking
B
Speaking general
C
Generally speaking
D
Speaking generally
Statistics show that men have _____ as women do for every mile they drive．
#93537
A
serious accidents as twice many
B
twice as many serious accidents
C
twice serious accidents as many
D
serious accidents as many twice
Don’t be discouraged. ____ things as they are and you will enjoy every day of your life.
#92166
A
Taking
B
To take
C
Take
D
Taken
—I read the 21st Century Senior 2 Edition every day. —_____ no wonder that your vocabulary is so large.
#93618
A
There is
B
There will be
C
It is
D
There could be