【答案】Ma Lin_______ stop training_______ he was too tired.

Ma Lin_______ stop training_______ he was too tired.

A.doesn't; until

B.won't; until

C.don't; until

D.didn't; until

【答案】

D

【解析】

句意：马林直到他太累了才停止训练。

可知考查not...until“直到......才”，后面一句是一般过去时态，所以前面也应该用一般过去时态，助动词didn't帮助构成，故选：D。