You look pale. ____ have a good rest? [ ]

Let’s dress up _____ a ghost. —OK, you can dress up _____ white.[ ]

Our English teacher always helps us _____ our English.[ ]

You’ve dropped __________ “s” in the word “across”.－Oh, you are right, __________ letter “s” should be doubled like this “cross”.

What’s that terrible noise? – The neighbors_______ for a party.