用下列单词的真确形式完成句子。

around, refuse，miss, magazine,  cool

小题1:We could ask her to help,but she ___________.

小题2:You look really ___________with these sunglasses.    

小题3:He enjoys reading books and__________when he is free.

小题4:Rita opened the door and found Dick walking __________outside.

小题5:I began to __________my family soon after I arrived in London.

釉板可成为龋病致病菌侵入的途径的原因是（）

A．是一种裂隙 

B．钙化过度 

C．未钙化 

D．晶体密度很低 

E．含有较多的有机物