－He asked Tom, “Have you finished your homework？”
－He asked Tom 　　　　.
A．if had he finished his homework.
B．whether he had finished his homework
C．if he had finished your homework.
D．if you had finished your homework.
B
連詞辨析。If和weather都能表示是否的意思，但是if還可以引導(dǎo)條件從句，表示如果。當(dāng)可能引起歧義時就只能用weather了。賓語從句中一般為陳述語序，可排除AD選項。選項C還可以表達，如果他完成了作業(yè)，他問湯姆的意思。故選B最符合上文語義。
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