Although SPanish， he attended the course.
C
「句意」虽然只懂一点西班牙语，但他还是参加了这个课程的学习。
「难点」know是静态动词，不能用于进行时;选knows从句中又缺少主语。knowledge作“知识”讲时是不可数名词，但作“了解”讲时，前面可加“a”，常用于词组haveraknowledgeof中，所以选C)。
Theteachers’union_________alawsuitagainstthedistrictcallingforrepairing“deplorable”schoolconditions.
Thethreementriedmanytimestosneakacrosstheborderintotheneighboringcountry_____bythepoliceeachtime.
AlthoughSPanish，heattendedthecourse.
Ifnot_____withtherespecthefeelsduetohim,Jackgetsveryill-temperedandgrumblesallthetime.
_____,hewouldnothaverecoveredsoquickly.