he ______ come hack to china ____ he learns english well .A.doesn't ; until B.doesn't ; after C.won't ;when D.won't ; until

问题描述:

he ______ come hack to china ____ he learns english well .
A.doesn't ; until B.doesn't ; after
C.won't ;when D.won't ; until

选D,他不会回中国直到学好英语