____ the loud noise of fireworks outside my house, I can hardly _____ on my lesson.[ ]

The old lady’s hand shook frequently. She explained to her doctor ______ this shaking had begun half a year before, and ______, only because of this, she had been forced to give up her job.

He doesn’t tell me when he_______ . I’ll telephone you as soon as he______.

China has been pushing the reform of public hospitals _______all its citizens.

We can’t afford to make any mistakes. To us, __________.