So difficult____it to acquire a large vocabulary without the help of a teacher that he was close to giving up .
There’s some doubt __________he’ll keep his promise.
Do you know ____John is getting on well with his studies?
-------Each of the students,working hard at his other lessons,______to go to university. ---So do I.
—What’s the matter with you? —______ the window , my finger was cut unexpectedly.
__________that no one enjoys__________________.