it is an oranre pen为什么用an而不用a
it is an oranre pen为什么用an而不用a
英语中的hour前面为什么用an,而不用a?
How many minutes in an hours 为什么用an而不用a呢
What's this?——___.(①It's a pen.②This is pen.③This is an pen.
this is an orange.it is orange.为什么第一个加an,而第二个不加an
amazing 为什么用an不用a
This is his green pen.That is a card.It is an orange.Is that
a used car为什么used前用a而不用an?
NCE2 lesson58 中 a useful source of income为什么用a 而不用an?
关于X-ray,关为什么X-ray前面用an而不用a.
为什么应该用I can not afford that expensive a computer而不用that an e
Bob is (a) eleven-year-old boy.为什么用a不用an?