Mum, Harry Potter is my favorite great book. I ______ it three times already.

When she was collecting rubbish in the morning， the cleaner saw a tall man in a black coat______outside the office．

Annie wasn’t at school today because she had to stay at home to ________ her mother.

Nankai University,_______ in 1919, has a history of more than 94 years. ( )

_______ in the regulations(规定) that you should not tell other people the password of your e-mailaccount.[ ]