--- Why did you buy two pairs of shoes?--- It was so hard to choose which was________, so I took them both.
No one can achieve success __________ effort.
----Drugs have done great harm to some people and their families. ----Quite true, so we should ________ them.
________ wonderful news report you made yesterday!
Seeing their teacher _______ into the classroom, they stopped _______ at once.
This pair of shoes ________ hand, and it _______ very comfortable .