海滩上无数的贝壳在阳光下闪闪发光。

The ___numerous seashells on the beach glistened in the sunlight.

夜空中的繁星数量多得数不清。

The ___countless stars in the night sky are impossible to count.

春节期间，上海外滩总是人山人海。

The ___multitudinous crowds at Shanghai's Bund during the Spring Festival are overwhelming.