------ Can I help you?
-------- No, thank you. I __________ now.
A．have been servedB．have servedC．a(chǎn)m being servedD．a(chǎn)m serving
C
考察時(shí)態(tài)語態(tài)。根據(jù)can I help you?可知，該對話發(fā)生在商店里，所以I和serve之間是被動關(guān)系，排除BD。因?yàn)榍懊嬗蠳O，所以我現(xiàn)在正在有人招待了。
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