问题：
You can"t imagine _____ when they received these nice Christmas presents.
[ ]
A. how they were excited
B. how excited they were
C. how excited were they
D. they were how excited
You can"t imagine _____ when they received these nice Christmas presents.
B. how excited they were
C. how excited were they
D. they were how excited
[ ]
A. how they were excited B. how excited they were
C. how excited were they
D. they were how excited
参考答案：