语法：主谓一致
1. But I know the government ________ his invention.
A. think highly B. speak high of
C. sing highly D. thinks highly of
2. She is the only one among the ______ writers who ______ stories for children.
A. woman…writes B. women…writes
C. women…write D. woman…write
3. The professor, together with his son, _________ Lanzhou _________ Beijing.
A. have left …for B. has left…for
C. have left …to D. has left …to.
4. Nobody but Sam and John __________ in the laboratory.
A. are B. had been C. were D. is
