. Society as a whole has a responsibility towards its weaker members, ________ as a result of circumstances they could not control, such as illness and disaster.
I’m glad to learn that his attitude _____ this plan is similar _____ mine.
_____ you have the chance to study, you’d better make full use of your time.
Vincent van Gogh’s paintings were at last _____ as works of genius.
You should visit your parents _____, even when you are very busy.
I still remember ______ to the south where we attempted _____ the river, which proved to be dangerous.