1. _____ improve his English, he does more and more reading and writing now.
A. So as to B. So that C. In order that D. In order to
2. After ______ the league, he often helps others.
A. joined B. joining C. joins D. had joined
3. Don’t stand _____ me, for I am doing an important experiment.
A. close B. closely C. closely to D. close to
