eraser前面用a还是an（red eraser前面用a还是an）

猜 an eraser 单词tv 课文tv

eraser, eraser, i have an eraser.

单词eraser前面用an还是a

pencil pen book an eraser ruler

an eraser an apple what's this in english? it's … book map

what's this? it's an eraser.

a pen an eraser a ruler a pencil ※ a pencil case

pencil pen book an eraser ruler

it's pencil-box. --what's this? --it's an eraser.

what's this in english? it's an eraser.