【B14】
A. five
B. eight
C. six
D. seven
James Cook ______.
A. was a commander of voyages for discovery Tahiti
B. used to joined the US Navy
C. was a sailor around the world three times
D. used to be an apprentice to a shipping company when he was young
【B9】
A. careful
B. sure
C. certain
D. thinkful
【B3】
A. know
B. remember
C. study
D. keep
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