关于摩擦力产生的条件，下列说法正确的是                            （    ）

用方框中所给单词的适当形式填空，每个单词限用一次。

____ Do you prefer  _____________ fashion magazines or news magazines?
____ The food that my father cooks ____________ good.
____ We should _________ the house as soon as possible, or it’ll be quite dangerous.
____ The population in that country _______________ slowly now.
____ Wild and Wind is a rock band which as the name suggests is full of _____________.