In many countries more and more forests and even agricultural land are being lost to development, _______ much of the land to become desert. 
#88916
A
caused
B
causing
C
having caused
D
to cause
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The twins,______at birth,do not know each other .
#98499
A
separated
B
being separated
C
having separated
D
having been separated
It is necessary ___ the magazines in time.
#98663
A
to us to return
B
for us to return
C
to us returning
D
that we had returned
____________ his accent, he is from the south of China.
#94020
A
Judged by
B
Judging to
C
Judging by
D
To judge