中级

单选题

A.however
B.So
C.and
D.but

参考答案:D进入在线模考
根据句意,“poor in traditional assets”,可  是却“they ale very competitive”。所以前后是  转折关系。B和C排除。A选项的however后  面应加逗号。所以正确答案是D。

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