case

电脑的外壳是用铝合金制成的。

The ___case of the computer is made of aluminum alloy.

我把眼镜放在这个硬壳盒子里以防压坏。

I keep my glasses in this hard ___case to prevent them from being crushed.

我把护照和机票都放在这个旅行包里。

I put my passport and plane ticket in this travel ___case.

机场里有很多丢失的行李箱。

There are many lost ___cases at the airport.