5. Ellie wanted to know how many days it took to get to Mars from Earth.

6. I asked Sally what she was starting at.

7. Joe asked his teacher who had discovered the planet Neptune. 

S + asked + O + wh-questions/if/whether + S + V (lùi thì).

Câu tường thuật - dạng Wh-questions 

S + asked / wanted to know / wondered + (O) +WH + S+ V (lùi thì)

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HTĐ --> QKĐ

HTTD --> QKTD

QKĐ --> QKHT

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5. Elliot wanted to know how many days it took to get to Mars from Earth.

6. I asked Sally what she was staring at.

7. Joe asked his teacher who had discovered the planet Neptune.

`color{orange}{~MiaMB~}`