I COULDN’T OPEN THE OFFICE DOOR BECAUSE SOMEONE _____ IT.A. LOCKED...

5. - BO CAU HOI TRAC NGHIEM ANH 10
Lớp 10 BO CAU HOI TRAC NGHIEM ANH 10
5. I couldn’t open the office door because someone _____ it.A. locked B. was locking C. had locked D. has locked