- _____________? -He's going fishing. A. What is Hector doing? B. Where is Hector going?

Hello, the CD is obviously wrong. You're stuck between a and B. Grammatically, both A and B are right, which is beyond doubt. But according to semantics, the best answer is that you should choose B. You can translate it and you will know why. Obviously, the fisherman described in the answer here is not at the scene.

If you choose a, the translation is as follows:

Q: What is Hector doing?

He's going fishing.

If you choose A, you emphasize the action of going, not fishing. He's going fishing, which means he's on his way or he's going fishing now. Not the expression "he is fishing". So it seems that the answer is a little different from what others asked. If a is selected, Going will be removed later, and the translation is as follows:

Q: What is Hector doing?

He is fishing.

If you choose B, it is only to answer the questioner's question, because Where asks the question, go will answer it later, and the translation is as follows:

Q: What is Hector going to do?

He's going fishing.

If you still don't understand, you can change it to the second person. This is the third person. For example, if you get on the bus with a fishing rod and are ready to go fishing, and you meet an acquaintance, people ask you:

Q: Hi, where are you going?

I'm going fishing. /I'm going fishing. You can't answer "I'm fishing/I'm fishing" because people ask what you are going to do, not what you are doing now. If people want to ask questions with what, they emphasize your current action. Your current action is riding a bike. )

For example, if you are fishing and an acquaintance sees you sitting by the lake, people ask you:

Q: Hey, what are you doing?

A: I'm fishing (because what emphasizes what you are doing now, it's wrong for you to answer "I'm going fishing/I'm going fishing" here)

In short, the question asked by what is aimed at the action you are doing at the moment, that is, the question asked by what corresponds to the first verb in the sentence you answered. The interrogative sentence "where" corresponds to the Go verb that follows. Be go(to do) means "you are preparing or you are going to do something", and your action at this time may be to prepare for what you are going to do. For example, if you are going to travel, maybe you are packing your clothes or you are buying a ticket. ...

Having said that, you should almost understand. I have basically explained the difference between these two sentences. Think about it carefully.

I wish you progress in your study!