1.When ______with practice,theory becomes easier to learn.A.combine B.to combine C.combined D.was combined2.I don't really work here. I _______until the new secretary arrives.A.just help out B.have just helped C.am just helping out D.will help out3.If you ______it, I will lend the novel to you.A.read B.will read C.have read D.want read4.Tom killed the cat.I'll ask him why_________.A.he did so B.did he do that C.he did D.he has done so標準答案是C C B A為什么呢？

熱心網友

1。combined 是過去分詞，2。進行時表示現在的狀態。3。虛擬語氣。4。賓語從句要用陳述形式。

熱心網友

1.原句=When it is combined with practice,...2.此為情景對話,表正在進行的動作3.will read 中的will意為"愿意',此時為情態動詞4.從句用陳述句式,且應用過去時態,故選A