For the first few mounths ,the babies looked so alike that i

題目：

For the first few mounths ,the babies looked so alike that i could not tell----
A:that was that b :which was which c:who was who d:what was what
選b,爲什麼呢?

解答：

首先tell 是及物動詞,所以後面缺少賓語,後面是個句子,所以是賓語從句.
然後看A,that 引導賓語從句,沒有實際意義,只起連接作用,因此A缺少主語成分.故錯.
C,因爲是baby,在英語中,嬰兒的代詞是it,因爲不明性別.所以這裡要用which而不是who.
D,what在提問人的時候是指職業.因此錯誤.eg：what is he?他是幹什麼的?
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