Question

It was only after I came across that matter_______ how important it was to master a foreign language

1. A.
   did I realize
2. B.
   had I realized
3. C.
   that I realized
4. D.
   when I realized

Answer 1

C
考查it was…that…的强调句型。去掉it was…that后，剩下I realized how important it was to master a foreign language only after I came across that matter，是一个完整句子，所以是强调句型。选C。