如图所示，MN右侧一正三角形匀强磁场区域，上边界与MN垂直．现有一与磁场边界完全相同的三角形导体框，垂直于MN匀速向右运动．导体框穿过磁场过程中感应电流随时间变化的图象可能是 （取逆时针电流为正）（ ）
( ) Peter often takes a walk ______his parents. A. to B. andC. with
( ) He usually plays _______piano on Thursday. A. theB. aC. an
( ) She _______get up at 6:00 . A.doB. doesn’tC. isn’t
( ) I don’t _______breakfast at 9:00 in the morning. A. hasB. havingC. have
( ) Can you tell me _______email? A. buy B. byC. at
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