----- Nội dung dịch tự động từ ảnh -----
17. Sam....to change a light bulb when he.................and....
A. was trying-slipped- fell
C. had been trying- slipped- was falling
18. Every day I
A. get-eat- leave
C. got-ate-left
B. tried- was slipping- falling
D. has tried- slips- falls
breakfast at seven o'clock and
up at 6 o'clock,
B. have got-eating- leaving
D. will get-have eaten-left
for work at 8 o'clock
19. ............................ for this company for more then thirty years, and I intend to stay here until
I...............next year
6