In part of China, some people still have difficulty gaining to social services.
He knows nothing about it, so he can’t help _______ any of your work.
Before going abroad he devoted all he could _______ his oral English.
He spent every minute he could _____ spoken English.
He ran as fast as he could _____ to catch the early bus.
Everyone in our class was working hard and doing what we could _______ a good college.