YOU ____ USE YOUR MOBILE PHONE ON THE PLANEA

6. - KIEM TRA TRAC NGHIEM 1 TIET UNIT 45 ANH 8 THI DIEM
KIEM TRA TRAC NGHIEM 1 TIET UNIT 45 ANH 8 THI DIEM

6. You ____ use your mobile phone on the plane

A.must B.must n’t C. don’t have to D. have to