Imagine how excited we were that our schoolmates had been admitted to some famous universities.
A. learning
B. having learned
C. to be learning
D. to learn
网友回答
A. learning
B. having learned
C. to be learning
(答案→)D. to learn
解析：句意：想象我们是多么高兴当得知我们的同学已经被一些著名的大学录取。be excited to do sth,这里是感叹句，被感叹的词是excited，所以how +形容词 +主语+be to do，故选D。