根据句意，在答题卡标有题号的横线上，写出括号内所给单词的适当形式。

小题1:We felt strange about his        ( silent) at the party as he used to be very outgoing.

小题2:“Will it be possible to get me another ticket?” he asked        (hopeful).

小题3:Rub this oil into your skin and your headache will soon      (appear)! Have a try!

小题4:It’s said that Chinese parents are         (strict) with their children than American parents.

消除管道震动的有效措施之一是在管道适当的位置设置固定支架、导向支架、滑动支架或限位装置，必要时设置减震器或阻尼器。