We were told not to touch the equipment in the laboratory unless ________.
#101834
A
allowed to do
B
allowing to do
C
allowed to
D
allowing to
推荐题目
By the time you have completed the essential training, you _____ exposed to virtually every new feature of the course．
#103085
A
are
B
will have been
C
have been
D
will be
John and I＿＿＿friends for eight years.We first got to know each other at a Christmas party.But we＿＿＿＿＿ each other a couple of times before that.
#104639
A
had been； have met
B
have been； have met
C
had been； had met
D
have been； had met
一When shall we start the restoration of the historic buildings?一Not until our plan________ by the committee．
#103180
A
will be approved
B
approves
C
is to approve
D
has been approved
Do you know when Mr. Brown _______? When he _______ , please let me know.
#101257
A
will come; will come
B
comes; is coming
C
is coming; comes
D
comes; will come
— So many ages since I last saw you that I ____________ you at all!— I wouldn’t have, either, if someone _____________ your name.
#101462
A
didn’t recognize; hadn’t called
B
didn’t recognize; didn’t call
C
haven’t recognized; didn’t call
D
wouldn’t have recognized; hadn’t called