26. There’s ______ sign saying “No Parking”. Please don’t park your car here.
A. a B. an C. the D. /
27. Believe in ______ and work hard, then you will succeed.
A. myself B. ourselves C. yourself D. herself
28. ---What about going to the cinema by taxi?
---We ______ take a taxi. It’s only ten minutes’ walk.
A. can’t B. needn’t C. mustn’t D. couldn’t