Britain announced tighter security measures this week, with plans ______ full-body scanners at Heathrow airport within three weeks. 
#91560
A
to use
B
to be using
C
being used
D
having used
推荐题目
With all the audience ________, the speech began. 
#91311
A
sat
B
seating
C
seated
D
having seated
_______ on earth do you suppose_______ this?
#91155
A
What; could do
B
What; could have done
C
Who; do
D
Who; could have done