i ____ the blackboard carefully ____ i can't ___ the words clearly .

问题描述:

i ____ the blackboard carefully ____ i can't ___ the words clearly .
A.look at ;but ; look
B.look at ; but ; see
C.see ; and ; look
D.look ; and ; see

选A 我仔细地看着黑板 但是我看不清那个单词