In order to find the missing child, villagers         all they can over the past five hours.
#99305
A
did
B
do
C
had done
D
have been doing
推荐题目
Some buildings built in the past _______ down and new ones are being built there.
#103572
A
will be pulled
B
had been pulled
C
have been pulled
D
are pulling
It is demanded that you ____ at six. 
#102746
A
will arrive
B
arrive
C
arrived
D
would arrive
Oh, it’s you! I _______________ about our meeting here.
#102246
A
have never dreamed
B
had never dreamed
C
never dream
D
never dreamed