If you buy this big TV set,you can get the camera ______ free. A)for B)on C)with D)from

If you buy this big TV set,you can get the camera ______ free. A)for B)on C)with D)from
If you buy this big TV set,you can get the camera ______ free. A)for B)on C)with D)from

If you buy this big TV set,you can get the camera ______ free. A)for B)on C)with D)from
for
固定词组：for free意为“免费”