问题补充：
The letter she had been looking forward to her yesterday.
A. reached
B. reaching
C. reach
D. reaches
答案：
(答案→)A. reached
B. reaching
C. reach
D. reaches
解析：本题考查谓语动词。句中look forward to盼望，期望，在句中作定语，修饰the letter。句中缺少谓语动词，根据时态，用一般过去时。句意：她所一直期盼的信昨天到了。
