单词拼写。

1. It's qu__ t __ a nice cat.

2. The bus is coming. Be c__ __ __ ful.

3. What's the time? It's a qu __ __ ter past one.

4. —How many m__ __ls do you have a day?

    —Three: breakfast, lunch and supper.

5. Tigers are a kind of __n__m__l.

6. There is a smile on her f__c__.

蒸熟的馒头或面包松软其原因是 [ ]

A．乳酸菌发酵的结果       

B．酵母菌发酵的结果

C．醋酸杆菌发酵的结果      

D．以上都不是