．_______ the weather was terribly bad,_______ they kept on working.A．Because,and B．Though,but C．When

题目

．_______ the weather was terribly bad,_______ they kept on working.A．Because,and B．Though,but C．When,but D．Though,/

答案

【d】虽然天气很糟糕,仍然他们继续工作.
though 表示虽然但是,不能与but连用