1 . I was studying for the test when the rainstorm came. (对划线部分提问)
______ were you doing when the rainstorm came?

2 . The new sunglasses cost 29.9 dollars.(划线部分提问)
________   ________ do the new sunglasses cost?

3 . Every two weeks,(每两周) the train carries lots of fruit to the small town.(画线部分提问)
________   _______does the train carry lots of fruit to the small town?

4 . — ________ is her daughter?
— The girl on the right wearing blue jeans.

A．Who

B．What

C．Which

D．Where

5 . 他为什么不能来？
________ ________ ________ that he can't come?