When first to the market, these products enjoyed great success.
A. introducing B. introduced C. to introduce D. being introduced
There is cooking oil left in the house. Would you go and get .
A. little...any B. little...some C. a little...any D. a little...some
--I haven’t heard from John for a long time.
--What do you suppose to him?
A. was happening B. to happen
C. has happened D. had happened
The reporter said that the UFO east to west when he saw it.
A. was traveling B. traveled
C. had been traveling D. was to travel
Many countries are increasing their use of natural gas, wind and other forms of .
A. energy B. source C. power D. material
-- the American film been shown on TV?
--Yes, it shown last week.
A. Has...had B. Has...was C. Have...had D. Are...was
