【题目】Your grades will not become better and better ______ you study hard.
A. if B. till C. or D. until
【题目】Today computers __________ in both cities and towns.
A.were using
B.are used
C.were used
D.are using
【题目】Your grades will not become better and better ______ you study hard.
A. if B. till C. or D. until
【题目】Today computers __________ in both cities and towns.
A.were using
B.are used
C.were used
D.are using