______ with so many challenges, Yang Guang, a blind young fellow, didn’t give up; he made great efforts to win success.
Mr. White as well as his friends ________ a number of countries in the past few years.
Helen always helps her mother even though going to school_______ most of her day.
She will fly to Washington, ________ she can enjoy herself.
These experiences ______ me _____ the drug’s harmful effects.
— Did Alan enjoy seeing his old friends yesterday? — Yes, he did. He _____ his old friends for a long time.