问题
选择题
Bob________after his classmate in the classroom when his teacher________.[ ]
A．ran；turned up
B．was running；turned up
C．was running；would turn up
D．had run；would turn up
答案
答案：B
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Bob________after his classmate in the classroom when his teacher________.[ ]
A．ran；turned up
B．was running；turned up
C．was running；would turn up
D．had run；would turn up
答案：B