Mr. Wu _____ this math problem _____him many times, but he still doesn’t understand it.
A. explains； to B. have explained； for
C. has explained； to D. explained； with
My parents want me to get further study to be ________ an engineer _______ a scientist, ________ I would like to be a famous surgeon doctor.
A. neither； nor； and B. either； or； but
C. not only； but； so D. both； and； or
--- The boy never watches TV in the evening, ________ he?
--- _________, but only at the weekend.
A. doesn’t； Yes B. doesn’t； No
C. does； Yes D. does； No
Mr. Wang made up his mind to devote all he could ________ his students’ English.
A. to improving B. to improve C. improve D. improving
The general manager of the company asked me _______ I was interested in working for her.
A. that B. what C. whether D. weather
Yesterday I _______ my umbrella at home. So I had to take ___________.
A. forgot, someone’s else
B. left, someone's else
C. forgot, someone else’s
D. left, someone else's
