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29．In 1778, Banks was elected_____president of_______Royal Society,___________position he held for 42 years.

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

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

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

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

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

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

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

In 1778, Banks was elected ________president of _______Royal Society, ________position he held for 42 years

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