_____ the city’s public school system should be opento the children of migrant workers has become the focus of discussion.

His mother repeated telling him that he should work hard, but _____ didn’t help. [ ]

What do you think of the plan—I feel ___that we ought to give it up atonce.

Daniel is good at physics and speaks fluent Chinese — ____________

The old houses are being pulled down to ____ a new office block.