Overpopulation is a terrible threat to the human race.Yet it is probably ____ a threat to the human race than environmental destruction.

Despite their good service, most inns are less costly than hotels of _____ standards.

—Is the People’ Great Hall _______to ordinary visitors?—Of course.  

We can’t get the machine to run. There must be ______ with it.

–Bob’s tape recorder is so wonderful. --Mine is at least ___good, if not ___.