65. It is absolutely essential that William( ) his study in spite of some learning difficulties.

76. The teacher told the students to stay in the classroom and they did ( ).

75. His( ) in gambling has eventually brought about his ruin.

74. Joan is in the dorm, putting the final ( ) to her speech.

73. The police had difficulty in ( ) the fans fi'om rushing on to the stage to take photos with the singer.

72. Because of the economic crisis, industrial output in the region remained( )

71. The team has been working overtime on the research project ( ).

70. In the face of unexpected difficulties, he demonstrated a talent for quick, ( ) action.

69. School started on a ( ) cold day in February.

68. There were 150 ( ) at the international conference this summer.

67. During the summer vacation, kids are often seen hanging ( ) in the streets.