See above.In test your English level there are many questions have mystified me although they seem easy but indeed they might get down any way some of them here.
1.It's all right, we needn't /shouldn't hurry. We have plenty of time.
Why do we choose needn't instead of shouldn't?.
"We shouldn't" suggests that it is not advisable to do something. What is required here is something which means "It's not necessary..."
2.Joanna looks nice/nicely in her new dress.
Why do we use nice not nicely?
"Nicely" is an adverb describing how we do something. "She looks", in this context, is not a verb which attracts an adverb, it means "She appears to be..." which would, I'm sure you know, would be followed by an adjective, hence "nice".
3.He has been accused/blamed for armed robbery.
Which one is correct and why?
Neither is correct in this case. If we use "accused" then it needs to be followed by "of", not "for". If we use "blamed for" it needs to be followed by an article.
4.The book shop rang to say/to tell that the dictionary you ordered has arrived.
Why do we use to say not to tell?
We could use "tell" but only if the next word were "you/me etc".
They rang to say that ...
They rang to tell you that ...
5.They blamed /accused/arrested/ punished him of scratching the car.
Why do we use accused? He can be blamed or arrested.
Much like Question 3, the clue is in the preposition.
Punished for ...