According to the police, _______ some facts undiscovered.
As more and more restaurants join “clear your plate” campaign, people are encouraged _______ food any more.
Can I have some more ice cream,Mum?–Sorry. There is _______left in the fridge.
He goes to school by bus, but he walks ______after school.
Can I use your notebook computer this afternoon? ________ is under repair.— No problem.