In order to produce more grain, it________that the area of farmland_____.
A．is demanded, being increasedB．has been demanded, be increased
C．demand, should be increasedD．demands, should increase
B
本題考查時態(tài)及虛擬語氣。根據(jù)語境可知，那個地區(qū)已經(jīng)被要求，故用現(xiàn)在完成時的被動語態(tài)，demand + that從句，用should + V原形，根據(jù)語境用被動，選B。
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