C. 请根据句意从方框中选择合适的动词，并用其适当时态填空，使句子通顺。

小题1:Don’t be late again, Tom. Otherwise I ________ you.

小题2:—What do you think of my suggestion?

—Sorry. What’s that? I _______ to my favourite song. 

小题3:Lucy ________ to school on her own when she was in the middle school.

小题4:I feel energetic again because I _________ a rest. I can devote myself to this work now.

小题5:We are told that sound __________ through air at a speed of about 340 metres per second.

用汽油一空气吹管熔金器熔化中熔合金时，熔化金属的最佳火焰层是（）

A.混合焰

B.燃烧焰

C.还原焰

D.氧化焰

E.还原焰及氧化焰