I read _____ article ______ a boy from the USA.
A. a, by B. an, from
C. an, by D. a, from
Gina loves singers _______ write their own music.
A. which B. who C. has worked
Jim _________ in Zhuzhou 
since he finished his college.
A. works B. is working C. has worked
He knows _________ about computer than me.
A. much B. more C. most
Mary didn’t go to John’s birthday party because she ________.
A. wasn’t invited B. didn’t invite C. isn’t invited
Tony wants _______a job as a language teacher in China.
A. to find B. finding C. find