问题补充：
on this report the English government decided to ask Captain Cook to go and look for this continent.
A. Having based
B. Basing
C. Based
D. To be based
答案：
A. Having based
B. Basing
(答案→)C. Based
D. To be based
解析：考查非谓语动词。be based on以……为基础。在句中作状语，故用其based。选C。
