月亮突然从云层后面出现了。

The moon suddenly ___appeared from behind the clouds.

他看起来对结果很满意，尽管遇到了些困难。

He ___appeared pleased with the result, despite some difficulties.

这位歌手将在今晚的音乐节上登台表演。

The singer will be ___appearing at the music festival tonight.