请将下列单词中不同类别词挑出来，把该词的序号写在前面的括号里。
（1）A.lion B.tiger C.animal D.elephant
（2）A.five B.clock C.seventeen D.twenty
（3）A.cake B.camera C.sweets D.bread
______ houses are more beautiful than ______.
| A．Their; we | B．Theirs; ours | C．Their; ours | D．They; we |
I am the ______ runner in the class.
| A．2rd | B．twoth | C．two | D．second |
There are a lot of ______ in the bag.
| A．potato | B．potatos | C．potatoes | D．Potatoses |
We are going to stay there for ______ hour.
| A．a | B．an | C．the | D．/ |
If it is 3 o’clock in the afternoon in China, what time is it in Britain?
| A．Morning | B．Afternoon | C．Night | D．Evening |