What’s the matter with you?— _______ the window, my finger was cut unexpectedly.

下列句子中，语言运用得体的一句是

My son is studying for an important exam. Could you please the music a little -I’m very sorry.

27 The Grand Theatre in Shanghai is opento visitors during the daytime ______ there is a performance going on

k he must be writing his essay at home now,______