I must tell you how _____ a letter from you.

I must tell you how _____ a letter from you.
A、pleased I was to receive
B、pleased I was to receiving
C、was I pleased to receive
D、pleased I was receiving
【正确答案】：A
【题目解析】：感叹句的用法。以how引导的感叹句，后接形容词或副词，因此可以排除C。be pleased to do sth．乐意做某事，因此只有A正确。我必须告诉你收到你的信后我是多么高兴。