The city was difficult ________, _________ was defended by an army of 6,000 men.
#98005
A
to be taken; which
B
to take; that
C
to take; which  
D
to be taken; that
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____several times,but unfortunately,the boy still couldn’t smooth away the problem on his own.
#98193
A
Having been explained
B
The problem having been explained
C
The problem had been explained
D
Although the problem had been explained
The school required ____.
#98657
A
rebuilding
B
to be re uilt
C
to have rebuilt
D
rebuilt