All 　　is needed is a supply of oil.

When you go outing with your sisters, you must see to ________ that they are safe.

 We have made ______ clear that we are strongly against smoking in the office.

 Even if they are on sale, these air-conditioners are equal in price to , if not more expensive than , ______ , at the other store.

—Wow! You’ve got so many clothes． —But _____ of them are in fashion now．