语法填空
①He is absorbed in work, ____________ he often is.
一如往常，他专心工作。
② ____________ we all know, the earth is round.
众所周知，地球是圆的。
③We need to go back to our hometown, ____________ is reported in the newspaper, the war begins.
我们必须要回国了，就像报纸说的一样，战争开始了。
④____________ is said above, we must protect our earth.
就像上面说的一样，我们必须守护我们的地球。
⑤The two brothers were satisfied with this decision, ____________ was agreed beforehand.
两兄弟对此决定都满意，这项决定在事前都已得到他们的同意。
⑥Taiwan is, ____________ you know, an inseparable part of China.
你知道，台湾是中国不可分割的一部分