根据句意从方框中选择合适的单词并用其适当形式填空。(5分)
| man knife I her class |
81. Mom, help _______ find my friend Jim, please.
82. This bike isn’t mine. It’s _______.
83. Mike and I are in the same grade, but we are in different _______.
84. —Whose _______ are in the desk?
—They are Ann’s and Dick’s.
85. —Who are the two ________?
—They’ re our teachers.
