You will find the game is not so difficult to play ______ you understand its rules.
#67593
A
until
B
since
C
before
D
once
推荐题目
 The songs _____ she sang in the concert yesterday sounded _____.
#71888
A
/ ; beautifully
B
that ; wonderfully
C
which ; well
D
/ ; nice
       , we could forgive him for his mistakes!
#70023
A
Were he still a child
B
If he is still a child
C
Did he realize he is wrong
D
He were still a child