问题
选择题
Robert failed to complete his education____ he found it hard to focus on his studies.
A．although
B．if
C．because
D．while
答案
答案：C
考查连词。主句与从句之间是因果关系，故用because.
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Robert failed to complete his education____ he found it hard to focus on his studies.
A．although
B．if
C．because
D．while
答案：C
考查连词。主句与从句之间是因果关系，故用because.