Mary ________ an English song at the party yesterday. She did wonderfully.

1. A.
   heard sing
2. B.
   was heard sing
3. C.
   heard to sing
4. D.
   was heard to sing

[　　]

The girl________ an English song in the next room is Tom's sister.

1. A.
   who is singing
2. B.
   is singing
3. C.
   sang
4. D.
   was singing

Listen! Someone______ an English song now.

A. sings?? B. sang?? C. is singing?? D. was singing

--____________ you sing an English song?

--- Yes, I can.

A. Can                      B. May                     C. Must                             D. Need