________ — He is modest and energetic.

You ought to have learnt all these sentences by heart.— ____, but I forgot everything when I was asked to recite them in front of so many students. [ ]

_____ is believed that Bell invented the first telephone in1876.

_______ the novel, the hero disappearedagain.

After the quarrel, I tried to fix the misunderstanding between us, but all my efforts seemed ______.