— Did a letter come for me this morning?
— Yes. _____ came for you.
A. That B. It C. One D. The letter
This ticket _____ one adult and one child to the show.
A. promises B. enters C. admits D. includes
My son has gone abroad. I’m looking forward to him_______.
A. return B. to return C. returning D. returned
It is good manners to eat up _______is left in your plate.
A. that B. what C. which D. all
Can you explain ________ the sun goes down in the west?
A. why is it that B. why it is that C. how it is that D. how is it that
A huge amount of oil was spilt on the East Sea, the causes of ______ are still under investigation.
A. it B. that C. which D. whom
