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。
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