With the help of high technology, in the past few years, electronic business __________          to bank industry, travel industry.

With the help of high technology in the past few years, electronic business ______  to bank industry and travel industry.

1. A.
   applied
2. B.
   have applied
3. C.
   had been applied
4. D.
   has been applied

With the help of high technology, in the past few years, electronic business __________           to bank industry, travel industry.

A. applied                                                       B. have applied

C. had been applied                                                 D. has been applied

 With the help of high technology in the past few years, electronic business ______  to bank industry and travel industry.

A. applied      B. have applied     C. had been applied    D. has been applied

With the help of high technology in the past few years, electronic business ______  to bank industry and travel industry.

A. applied         B. have applied     C. had been applied       D. has been applied