1. The price of the beer ______ from 50 cents to $ 4 per liter during the summer seasons.

A. ran            B. separated        C. ranged      D. differed

2. — What’s that noise?

  — Oh, I forget to tell you. The new machine _________.

A. was tested     B. will be tested       C. is being tested      D. has been tested

3. You may use the room as you like _______ you clean it up afterwards.

  A. so far as     B. so long as      C. in case          D. even if

4. —Don’t throw the cigarette about for the grass ___________ fire easily.

   —What should we do if it is___________ fire?

A. sets; caught  B. catches; caught C. catches; on     D. sets; on