— Why does the boy keep crying?

— It is ______ he has lost his favorite car model.

A. since               B. so          C. when           D. because

It is said _______has been translated into Chinese.

A.that    B.which    C.that which    D.that that

--- Why does the boy keep crying?
--- It is ______ he has lost his favorite car model.

1. A.
   since
2. B.
   so
3. C.
   when
4. D.
   because

Nowhere ________ that life always goes smoothly.

1. A.
   it has been said
2. B.
   it is said
3. C.
   has it been said
4. D.
   does it say