There is a mistake in each sentence

X- There is a mistake in each sentence. Find and correct it

77. Children shouldn’t playing video games.

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78. My house is between the tall trees.

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79. Would you want to go to the zoo with us?

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80. How much is that packet of milk cost?

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81. He never drinks coffee so it is not good for his health.

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82. I have bought a red small car

83. She has a long black hair, she loves her hair vary much

84. I watched a two hours film on TV last light, it was very moving.