____ the boy was walking down the street, the UFO landed.A.While B.After C. Before
The American singer wants to have ________.
What’s the matter ________ you?
I should go to see a dentist because I ________.
— ________ do you watch TV? — Every day.
---- Is thatpen? ----- No, It is eraser. A. a; aB. a; an C. /;an