问题补充：
It is reported that many a new houseat present in the disaster area.
A. are being built
B. were being built
C. was being built
D. is being built
答案：
A. are being built
B. were being built
C. was being built
(答案→)D. is being built
解析：考查主谓一致。many a +单数名词，许多，做主语时谓语动词应用单数；又因为at present表现在，应用一般现在时态，句意：据报道许多新房子现在正在灾区被建造。故选D
