治理管涌与流沙（土）的原则是以防为主，管涌与流沙（土）防治的方法与措施应与工程结构及其他岩土工程措施结合在一起综合考虑，宗旨是（）。

A.防渗及加强渗透力

B.防渗及减弱渗透力

C.增加土体自重

D.缩短渗径

It is in Hong Kong _______ you’re going to find the cellphone _________ you have been wanting to buy.

A．that; that

B．where; which

C．where; /

D．that; what