用方框内所给单词的适当形式填空（5分）

小题1:The traffic accident caused a fire __________, no one was killed.

小题2:It’s important to get at least eight ____________ of sleep every day.

小题3:Yesterday is my brother’s _______________ birthday.

小题4:Smoking is the second ___________ cause of death in the world.

小题5:There are about two ____________ students in our school.[

可导致Ⅰ型酪氨酸血症的是（）

A.延胡索酸乙酰乙酸水解酶缺陷

B.甲硫氨酸合成酶缺陷

C.苯丙氨酸羟化酶缺陷

D.葡萄糖-6-磷酸酶缺乏

E.α₁-抗胰蛋白酶缺乏