21. In 1778, Banks was elected ____ president of the Royal Society, ____ position he held for 42 years.

A. the; the               B. /; a                   C. a; a                   D. /; the

22. ____ I admit that the problems are difficult, I don’t agree that they can’t be solved.

A. As                      B. When                C. While               D. Despite

23. Although I spoke slowly in my lecture, my meaning didn’t really _____, I’m afraid.

A. get across            B. get around         C. get through        D. get on