My best friend Jack looks happy, and he always ________ a smile ________ his face.
| A．wear; on | B．put; in |
| C．wears; on | D．wears; in |
My mother asked me _______.
A.what I was doing
B. what are you doing
C.what was I doing
Linda hasn’t finished her homework ______.
A. already B. just C. yet
The population now is much ______ than that 20 years ago.
A. large B. larger C. largest
Everyone ______ to pick up litter on the ground.
A. is supposed
B. supposes
C. are supposed
I think we ought not to spit anywhere ______.
A. in public
B. in need
C. in detail