LONG IS WORKING IN A BICYCLE FIRM. HE ... THERE SINCE 1978.A. HAD...
17. Long is working in a bicycle firm. He ... there since 1978.
a. had worked
b. has been working
c. were working
d. was working
-> b
17. Long is working in a bicycle firm. He ... there since 1978.
a. had worked
b. has been working
c. were working
d. was working
-> b