69. I am writing ______ ask you to explain.

70. He said that most problems ______ by teenagers.

71. What ______ to do at the weekend?

72. Football ______ in most countries.

73. Who was ______ the door?

74. We _______ lunch when you called.

75. Your work is ______ better.

76. She could play the piano ______ she could walk.

77. The train was cancelled, so we ________.

78. The problem was ______ solved.

79. I ______ I had been able to meet her.

80. They ______ an old picture of the place.

81. It was a difficult journey, but I ______ get home.

82. We had not _____ heard the news.

83. We arrived at the station, but the bus ________ earlier.

84. We can ______ walk or go by car.

85. If I ______ enough money, I'd buy a new apartment.

86. It ______ correctly.

87. The accident wouldn't have happened, if you had been more ________.

88. It ______ be possible some time in the future.

89. Schools then ______ having more children in the class.