Peter was about to unlock the door________he found someone had broken into the room
A. once
B. before
C. than
D. when
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Why you would________a good public speaker，I suppose．
A. fall
B. grow
C. do
D. make
A.veryB.mostC.moreD.1ess
A. very
B. most
C. more
D. 1ess
设直线的方程为x=Y-1=z，平面的方程为x-2y+z=0，则直线与平面（）。
A. 重合
B. 平行不重合
C. 垂直相交
D. 相交不垂直
People sometimes forget the Baffle of a stranger they meet because________．
A. it is difficult to remember names
B. they have bad memory
C. they haven’t caught the name
D. they haven’t listened to it
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