THEY HAVE TO ASK THEIR PARENTS’PERMISSION IF THEY ………. OUT AFTER SC...

3. - DE THI HKI TA 9 20102011CO DAP AN
DE THI HKI TA 9 20102011CO DAP AN

3. They have to ask their parents’permission if they ………. out after school.

a. went b. go c. are going d. have gone