HEALTH AND HYGIENETEST 1.TEST 1.

20. - BAI TAP TIENG ANH LOP 7 TRAC NGHIEM TU BAI 1 16
Lớp 7 BAI TAP TIENG ANH LOP 7 TRAC NGHIEM TU BAI 1 16

20. When … you have to go to the dentist yesterday?

a. did b. do c. doing.