1．Many a new measure ________put forward to reduce air pollution so far.
A. have been B. has been
C. was D. were
[解析]so far与现在完成时连用，many a ＋单数名词作主语，谓语动词用单数形式。
[答案]B
2．Not only I but also Li Lei and Han Meimei ________ tired of so much homework every day.
A. am B. is C. are D. was
[解析]本题考查主谓一致。not only... but also... 连接并列主语时，谓语动词的单复数遵循就近原则，因此，本题谓语动词的单复数取决于 Li Lei and Han Meimei，故C项正确。
[答案]C
3．Thirty percent of the cattle ________ thin, but the rest ________ fat.
A. are; are B. is; is
C. is; are D. are; is
[解析]本题考查主谓一致。分数、百分数修饰名词作主语时，谓语动词的单复数往往取决于它所修饰的名词，故第一空的单复数取决于可数名词 cattle，用复数；the rest 既可以指代可数名词，又可以指代不可数名词，作主语时谓语动词的单复数亦取决于所修饰的名词，由语境可知，此处 the rest 指代可数名词 cattle，谓语动词也用复数，故A项正确。
[答案]A
