If nothing________，the oceans will turn into fish deserts.
| A．does | B．had been done |
| C．will do | D．is done |
By working slowly but surely towards your goal, you'll___________succeed.
A. eventually B. accidentally C. occasionally D purposely
Thinking that her daughter was doing homework, the mother left the room, ___________.
| A．quickly and gentle | B．quick and gentle | C．quickly and gently | D．quick and gently |
When you retell the story, don't___________any important details.
| A．bring out | B．let out | C．leave out | D．make out |
___________World Expo is regarded as the Olympic Games of the economy, science and technology, ___________expert said.
| A．A; an | B．The; an | C．The; a | D．A; the |
It is generally considered unwise to give a child___________he or she wants.
| A．however | B．whatever | C．whichever | D．whenever |