问题补充：
---Why did Suzy look so stressed when we saw her?
---Because she wondered.
A. what her sister has done during the trip
B. when would her father come back
C. if she had passed the driving test
D. where did the other friends do
答案：
A. what her sister has done during the trip
B. when would her father come back
(答案→)C. if she had passed the driving test
D. where did the other friends do
解析：此题重点考查宾语从句的时态和语序问题，无论哪种句式结构充当宾语从句都要用陈述句语序，从句的时态要和主句的时态保持一致。主句的谓语动词是过去式从句的谓语动词也要用相应的过去时态。若从句表达的是真理或客观事实，不管主句的谓语动词是何种时态从句都要用一般现在时。根据语境可知wondered是过去时，其后的宾语从句也要是相应的过去时，语序必须是陈述句语序，故选择C。
