The couple look very excited because their only son has been to Hong Kong University.A. en

问题补充：

The couple look very excited，because their only son has been to Hong Kong University.

A. entered

B. permitted

C. agreed

D. admitted

答案：

A. entered

B. permitted

C. agreed

(答案→)D. admitted

解析：考查固定搭配。固定搭配be admitted to…被…录取。句意：那对夫妻看起来很兴奋，因为他们唯一的儿子已经被香港大学录取。故D正确。