检修后的电机车空载时间不少于（）。
A.半小时
B.1小时
C.2小时
参考答案：B
水稻的叶片和分蘖具有同伸现象，一般分蘖的抽出比主茎出叶低（）个节位。
-Excuse me, Madam but is this the way to the town center? I am afraid I ______ the right direction.
-Keep on walking and you can't miss it. [ ]
A. don't walk in
B. am not walking in
C. haven't walked with
D. am not walking with
