The US official said North Korea — and Iran — should follow in the steps of Libya, which last December said it would work__________ to allow international weapons inspectors to do their work

Each of the students, working hard at their lessons, ______ the book— So have I

My grandfather is over seventy years old, he is verywell because he always____.

The increase of the number of the students in our school makes the computers not ______ to each student．

The weather in Inner Mongolia is always dry, but sometimes it _____ rain heavily.