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是考查定語從句嗎？該選in which case嗎？

有這樣一道題，想想看，是用in which case還是in either case，還是in this case?

You can get there by plane or by boat, but in _________ case it’s very expensive.

A. which                        B. this                        C. any                        D. either

【分析】此題應選D，其余三項均有可能誤選。首先不能選A，因為句中有并列連詞 but，這說明它是一個并列句，而in which case是用于引導一個定語從句；B也不能選擇，因為 this 也是表示“確定”含義的，它與前面的 by plane or by boat 這種不確定性也不相符；選項C也不行，因為 any 是表示三者或三者以上的情形的，而 by plane or by boat 只有兩種選擇。答案選D，either 表示“兩者中任意之一”。

請再看幾個例子：

He may be busy, in which case I’ll call later. 他可能忙，如若如此，我以后再來拜訪。

I may have to work late, in which case I’ll telephone. 我可能得晚點下班，那樣我會打電話的。

My father may have to go into hospital, in which case he won’t be going on holiday. 我父親可能需要住院，如果那樣他就不去度假了。

Sometimes feta is very salty, in which case no salt needs to be added. 有時，羊奶干酪很咸。如果這樣的話，就不必加鹽了。

She may be late, in which case we ought to wait for her. 她可能遲到，因此我們應該等她。

比較：

He may be busy, and in this case I’ll call later. 他可能忙，如若如此，我以后再來拜訪。

I may have to work late, and in this case l’ll telephone. 我可能得晚點下班，那樣我會打電話的。

My father may have to go into hospital, and in this case won’t be going on holiday. 我父親可能需要住院，如果那樣他就不去度假了。

Sometimes feta is very salty, and in this case no salt needs to be added. 有時，羊奶干酪很咸。如果這樣的話，就不必加鹽了。

She may be late, and in this case we ought to wait for her. 她可能遲到，因此我們應該等她。