"WHEN DID YOU START PRACTISING YOGA

Câu 42 (TH):

"When did you start practising yoga?" asked Tom.

A.

Tom wanted to know when I was starting practising yoga.

B.

Tom wanted to know when did I start practising yoga.

C.

Tom wanted to know when I had started practising yoga.

D.

Tom wanted to know when had I started practising yoga.