____I came into the office, the teachers are having a meeting.
A. While
B. When
C. Since
D. Once
____we fail, we trying____.
A. Even if, will not stop
B. Even though, will stop
C. Even, will not stop
D. Even if, will not stop to
The more we know the world, ____we will be.
A. the more success
B. the more successful
C. more successful
D. more the successful
Mary did very well in this test ____she had not prepared well.
A. considering (that)
B. although
C. because
D. when
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