______ YOU DO, YOUR COLD WILL LAST FOR A FEW DAYS AND THEN DISAPPEA...

7. - DE KIEM TRA HOC KI 2 LICH SU
DE KIEM TRA HOC KI 2 LICH SU

7. ______ you do, your cold will last for a few days and then disappear.

A. Who B. Whenever C. Medicine D. Whatever