Although this         sound like a simple task, great care is needed.
A．mustB．mayC．shallD．should
B
考查情態(tài)動(dòng)詞。句中may為“也許”之意。句意：盡管這也許聽(tīng)起來(lái)像一個(gè)簡(jiǎn)單地任務(wù)，但需要很大的耐心。
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