问题:
It was _______ you had done _______ made it possible for you to improve your English.
A.that ; that
B.that;what
C.what; what
D.what;that
It was _______ you had done _______ made it possible for you to improve your English.
A.that ; that | B.that;what | C.what; what | D.what;that |
参考答案: