The key to exercise solutions in chapter 4.1 for the textbook Speakout Intermediate - Workbook with authors Antonia Clare, J. J. Wilson and Stephanie Dimond-Bayir from Pearson Education
Question
Correct one mistake in each sentence.
Answer
You must tell him as soon as possible.
I've finished this exercise. What should I do now?
The clients don't have to come to the office. We can meet them at the restaurant.
I shouldn't tell you this, but the boss is leaving on Monday.
Do we have to wear a uniform?
Everybody must leave the building by 6p.m.
She has to be at work by 7.30a.m.
I think you should check what time the film starts.
You mustn't use a mobile phone in the classroom.
We have to wait until the IT man comes to fix the system.