Michael is from America.
Not only Susan but also Sandy _________ abroad for traveling. They will return next Sunday.
— _________ has Liu Xiang taken part in world’s competitions of 110-metre hurdles?— I’ve no idea. Let’s find it out on the Internet.
After the earthquake, many kind-hearted people did what they could ________ those who suffered from it.
Japan and other countries have taken action ________ prevent nuclear radiation (核辐射).
— Kitty, there’s ________ cooking oil left in the kitchen. Would you please go to the supermarket and get ________?— OK, Mum.