IF SOMEONE…………IN HERE WITH A GUN, I WOULD BE VERY FRIGHTENED.A. WO...

10. - CAC DANG BAI TAP TRAC NGHIEM TIENG ANH
CAC DANG BAI TAP TRAC NGHIEM TIENG ANH

10. If someone…………in here with a gun, I would be very frightened.

a. would walk b. walks c. had walked d. walked.