下列各项中，没有语病的一项是（ ）

. ______ we are sure about is the need to prevent children from being spoiled.

Tom says he ______ you and is helping you with the research at present.

many other boys of his age who are oftenaddicted to PC games, he is _______ on outdoor activities in the mountains.

How about camping this weekend, just for a change?— OK, _____ you want. [ ]