Where is my reference book? It was here a moment ago.—Someone ______ it by mistake.

With the electricity _____, all the machine stopped.

_ , I lost heart in Frenchlearning，but myfather often said to me, “Keep on workinghard；you will succeed ______ ”．

I just wonder _____ that makes him so excited.

The famous expert adapted his speech to ____ the interests of his audience.