根据句意，用括号内所给单词的适当形式填空。

小题1:His father looked______ (angry)at his son. Because he often makes mistakes.

小题2:Next Sunday will be my brother’s __________  ( nine ) birthday.

小题3:The children are very happy. They can’t hide their_________(excite)

小题4:_______ (luck), he found his lost pen just now.

小题5:The swallow flies to_________ (north) countries in summer every year.

小题6:Some people think learning English is________ (use).That’s wrong.

阻车器按操作方式有（）。

A、全自动

B、自动

C、半自动

D、手动