I found________hard to finish the work in such a short time.
You _____ tell anybody about this——it’s a secret.A. can B. must C. mustn’t
The answer is wrong.There are _____ mistakes.A. some B. no C. much
_____ is your grandmother? Is she fine?A. What B. How C. Where
The car is _____.It needs washing.A. clean B. dirty C. old
I didn’t go surfing _____ it was too cold.A. though B. so that C. because