【单选题】

Though every morning I queue(排队) at the bus stop very early, I am often (41) for school. The reason is that there are (42) buses for all the people who queue up at the stop, and the buses often arrive there late. (43) the time table,there should be a bus (44) fifteen minutes, but one often has to wait (45) hour for a bus to arrive.

By the time the bus arrives, (46) so many people in the queue that those near the (47) can’t get on the bus and (48) to wait for another thirty minutes before the (49) bus arrives.
I wish the bus (50) would put more buses on.
[A] half an[B] half a[C] half of