It is so difficult a problem that _____ student in this class _____ work it out.
---Would you mind letting me ______ your laptop for another two weeks? ---No problem.
It is well known that water is not _____ endless resource,nor _____ that can be made once more.
---Mom.I’m so tired.I can’t walk any further. ---______, my dear.You can make it.
A student will be immediately punished if he is foundin the exam.
—Would you mind if I take the seat? —.