题目

阅读理解阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。 If the crust (外壳) of the earth were not pretty solid (坚固的), it would be shaking about and moving up and down frequently. However, there are places in the rocks of the earth's crust where it isn't strongly held together—where faults exist. Along the faults, one rock might push against another with great force. The energy is changed to vibration in the rocks, so they begin to shake and we have an earthquake! The most famous one in North America was the San Francisco earthquakAfter the boy won the first place in the game, his mother hugged him and sent her ________ on his success.A.celebrationB.congratulationsC.communicationD.directions