21. In 1778, banks was elected ______ president of the Royal Society, ______ position he held for 42 years.
A. the; the B. a; a C.不填; a D. 不填；the
22. ---What does he want to do after he finishes middle school?
---He has made up his mind to join the army rather than______ to college.
A. go B. going C. went D. goes
