The calm water ends there and the river begins a headlong plunge.

　　平靜的河水突然中斷，開始奔騰直瀉而下。

　　The autumn begins about August.

　　秋天大致從八月開始。

　　The programme begins at 10:00.

　　這個節(jié)目10點開始。

　　Boarding begins in five minutes.

　　五分鐘后開始登船。