I’m sure we ______before.
A. have met
B. meet
C. had met
D. would meet
Jane has _____ to Beijing. She will come back tomorrow.
A. been
B. gone
C. went
D. never been
Tom did the exercise by______.
A. himself
B. he
C. herself
D. his
Jack did the work by______.
A. he
B. himself
C. his
D. him