I’m very tiredI _______ on the night shift for several weeks.

You’ve dropped _____ “s” in the word “acros”—Oh, ____ letter “s” should be doubled like this “across”.

In order to pass the examination, ______. [ ]

The beautiful scenery in Haiwaii is really to the visitors from the whole world.

____ has recently been done to provide more buses for the people, a shortage of public vehicles remains a serious problem.