A:人的心脏正常跳动一次的时间约为3s
B:成年人的步行速度约为11m/s
C:中学生的质量约为500kg
D:黑板的长度约为4m
He ____ (not go) to bed at 8:30.
She ____ (do) her homework at 7:00 in the evening.
Scott ____ (work) very long hours.
What time ____ you usually ____ (get) up?
I’m the last one ____ (take) a shower.
My father ____ (watch) TV in the evening.
下列句子句意明确、没有语病的一项是( )