问题
选择题
.
He was feeling bad. He went to work, _______, and tried to fix his attention on it.
A．however
B．so
C．although
D．while
答案
答案：A
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.
He was feeling bad. He went to work, _______, and tried to fix his attention on it.
A．however
B．so
C．although
D．while
答案：A