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

Miss Lin is handing out the exam papers. Let’s go and help_____.

We don’t doubt ____ he’ll give us much help. _____ we doubt is _____ he’ll come on time

We only heard about the meeting yesterday, so it ______ yet.

We’llour homework to our teacheremail.