Smile to the world, ________ the world will smile back to you.
| A．nor | B．but | C．or | D．and |
You _____ tell anybody about this——it’s a secret.
A. can B. mustC. mustn’t
The answer is wrong.There are _____ mistakes.
A. someB. noC. much
_____ is your grandmother? Is she fine?
A. WhatB. HowC. Where
The car is _____.It needs washing.
A. cleanB. dirtyC. old
I didn’t go surfing _____ it was too cold.
A. though B. so that C. because