Tom       fullmarks,buthewastoocareless       aspelling...

問題詳情：

Tom        full marks, but he was too careless        a spelling mistake.

A．could gain, to make                                    B．could have gained, to make

C．could have gained, and made                       D．could have gained, as to make

【回答】

C

【解析】

考查含情態動詞的虛擬語氣和時態。句意：湯姆本可以得到滿分的，但是他太粗心了，犯了一個拼寫錯誤。從but he was too careless and made a spelling mistake.可知是説明的過去的事情，排除AD，could have done“本可以做而沒有做”是虛擬語氣，符合句意，must have done過去一定做了，不符合句意，所以選C。

知識點：一般過去時及其被動式

題型：選擇題