单选题 It is only when you see that with your own eyes ______ fully understand how much he loves you.
A. can you B. you can C. that you can D. that can you

【正确答案】 C
【答案解析】[解析] 句子结构题。此句为一个典型的强调句句式。It's...that...，that不能省略，其后应接正常语序的句子，不需要倒装，故选C。