79. The twins are of medium height. (对画线部分提问)

　　 ______ ______ the twins look like?

78. There were some tigers in the mountains (改为否定句)

　 There ______ ______ tigers in the mountains.

77. Alice has a tennis racket. (改为一般疑问句)

　 ______ Alice ______ a tennis racket?

76. If people don’t have breakfast in the morning, they will feel tired and get angry ______(easy)

75. The ______(wonder) ocean is the largest habit in the world.

74. David is good at drawing and he’s going to be an _______(art) when he grows up.

73. As we know, Zhang Jiayi is famous for the different _______ (shape) of mountains.

72. My neighbor Helen never talks to me. She is so ______(friendly)

71. This is one of the ________(big) rabbits in the world. He eats 12 carrots, six apples and two cabbages every day.