______ that we purchase 10 copies of Travel to the Misty Country for the library. (A librarian writes to the head)

There’s some doubt __________he’ll keep his promise.

A comic strip is usually about ________ interesting story with an unforgettable end.

The article gives several ______ about why we shouldbuild up the harmonious society.

Tom usually gets up _____ half past six _____ Saturday morning.