Some students in Shanghai _______ e-bags for several months.
[ ]
A. have
B. have had
C. had
D. will have
B. have had
C. had
D. will have
I won't go to the concert because I __ my ticket.
[ ]
A. lost
B. don't lose
C. have lost
D. will lose
B. don't lose
C. have lost
D. will lose