Bob’s lectures ________ a fairly wide range and I can’t sum up what he says in a few sentences.
A．coveredB．conveyed
C．consideredD．commanded
A
解析　根據(jù)“I can’t sum up what he says in a few sentences”可知，這些報告覆蓋面很廣。cover涵蓋，涉及，符合題意。
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