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