Only after a baby seal is pushed into the sea by its mother ______ how to swim.A

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问题 Only after a baby seal is pushed into the sea by its mother ______ how to swim.

选项 A、will it learn
B、it will learn
C、has it learned
D、it has learned

答案 A

解析小海豚只有在被妈妈推进大海中时，才学会怎样游泳。only作副词置于句首时，主句采用部分到装结构，助动词位于主语前面，本句时态为一般现在时，故选A。

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