问题:
When asked to explain ________ made his lessons so exciting, the teacher kept silent.
A.what it was that
B.that what it was
C.what was it that
D.that what was it
When asked to explain ________ made his lessons so exciting, the teacher kept silent.
A.what it was that | B.that what it was |
C.what was it that | D.that what was it |
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