After the picnic, the lawn is l _ _ _ _ _ _ _ with plastic bags, fruit peels, waste paper and empty cans.
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Schools in the countryside suffer from a severe s _ _ _ _ _ _ _ of teachers and funds
When we finally arrived after hours’ walking in the rain, we were all e _ _ _ _ _ _ _ _.
To cut costs, the company has decided to r _ _ _ _ _ _ experienced staff with younger employees on lower salaries.
插入工作表的组合键是( )
A. Ctrl+F11
B. shift+F11
C. shift+F12
D. Ctrl+F12