( )64:What a nice garden!How well it --------- after!

答案：C
解析：改为陈述句相当于The garten is well looked after.意为：这个花园被照看得很好.句子应采用被动语态,所以是be looked after.
问题补充：
sound,smell,taste,feel等是系动词,在其之后要加表语（一般是形容词）,系动词没有被动语态,因为系动词实际上是不及物动词,其后没有宾语,是不能改成被动语态的.
look是实义动词也是系动词.
本题中look作为实义动词,用于词组look after sth.其后有宾语sth.所以改为被动语态为sth.be looked after.
look作为系动词后加形容词.
举例：
The weather looks fine.
The patient looks pale.