你能说大声点吗？我们在后面听不见你。

Could you ___speak ___up? We can't hear you at the back.

人们大喊让我说大声点，因为他们听不见我。

People shouted that I should ___speak ___up because they couldn't hear me.

请说大声点，这样房间里每个人都能听清你的话。

Please ___speak ___up so that everyone in the room can understand you.