Mother was in the kitchen ______ lunch while I was ______  the coming exam.
#76991
A
prepared; prepared for
B
preparing; preparing for
C
prepared for; prepared
D
preparing for; preparing
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After the speech, she was invited by the students _ ____ with them.
#67063
A
take a photo
B
taking a photo
C
to take a photo
D
taken a photo
The bomb______at 11:15 a.m. and killed 36 persons altogether.
#83882
A
exploded
B
exposed
C
exploited
D
exported
--Would you mind if I used your mobile phone?-- _______, please. 
#64329
A
Yes
B
Go ahead
C
Of course
D
All right
The extra room _______ very useful when we had visitors.
#70883
A
was proved
B
proved
C
has been proved
D
has proved