This is ____orange. It’s ____big orange.A. an, an B. a, a C, an, a D. a, an
When you feel helpless and _______, just remember you are not _____ in the worldbecause your friends are around you, including me.
---Do you think it will be fine tomorrow? ---_____________. It has rained for so many days.
It’s two and a half weeks since the exchange students __________ Wuxi.
Little Tom has got a lot of birthday presents, but he isn’t able to take all of them ___.
We can have ___ bluer sky if we create ___ less polluted world.