适合与婴儿说话的语用技巧包括（）。

A.句子要简短

B.语速要减慢

C.发音应拖长

D.话语多重复

—Bad luck! It's too late!

—It doesn't matter. The movie _____ for only a few minutes.[ ]

A. began

B. has begun

C. has been on