Question

______improve his oral English, he took part in the summer course

A．So as to

B．In order to

C．So that

D．In order that

Answer 1

B

试题分析：短语用法辨析。A项不能放在句首。CD项后面要接句子，只有B项后面接动词或者动词短语表示目的，句意：为了提高他的口语，他参加了夏令营。故B正确。
点评：要注意本文四项的用法差异：so as to不能放在句首；CD两项后面要接句子。