21.My grandfather has sent me _____ e-dog as my birthday present.

问题描述:

21.My grandfather has sent me _____ e-dog as my birthday present.
何以见得,它是以元音音素发音的?那么又该以什么来判断的?
选a还是an?

My grandfather has sent me an e-dog as my birthday preset(e-dog它是已元音音素发音的.所以一定填AN)