Choose the correct alternative.
1. Stop singing that song. You have sung/been singing it all afternoon.
2.That's it. I have done/been doing all my homework.
3.It's terrible! Max has had/been having an accident.
4.She's looked/been looking for her keys all day, but she still hasn't found them.
5.Why are you dirty? What have you done/been doing.
6.That actor has made/beenmaking twenty films.
7.My eyes hurt. I have worked/been working on the computer all day.
8.You have played/been playing computer games since ten o'clock this morning. It's time to switch off!
Напишите, и если не трудно, объясните по какому принципу это всё работает

1 stop singing that song. You have been singing it all afternoon
2 thats it. I have done doing my homework
3 It’s terrible! Max been having an accident.
4 Shes lbeen looking for her keys all day, but she still hasnt found them.
5 why are you dirty? what have you been doing.
6 that actor has beenmaking twenty films
7 my eyes hurt. I have been working on the computer all day.
8 you have been playing computer games since ten o clock this morning.its time to switch off!
А объяснить я не знаю как.

These are confused pairs of words. Choose the correct alternative for each sentence
1. COMMON / MUTUAL
a) The firm agreed that increasing client satisfaction was our ……….goal.
b) It was in the parties’. interest to reach an agreement quickly.
2. LESS / FEWER
a) There were. hours logged than the company expected.
b) The amount of gasoline was ………. than we had budgeted for.
3. PRINCIPLE / PRINCIPAL
a) The. reason we didn’t pursue it was the cost.
b) We didn’t want to continue the case, mostly because of …….
4. AFFECT / EFFECT
a) The cost will. the final contract.
b) We know that the. of the merger will create problems.

1. COMMON / MUTUAL
a) The firm agreed that increasing client satisfaction was our COMMON goal.
b) It was in the parties’ MUTUAL interest to reach an agreement quickly.
2. LESS / FEWER
a) There were  FEWER hours logged than the company expected.
b) The amount of gasoline was LESS than we had budgeted for.
3. PRINCIPLE / PRINCIPAL
a) The PRINCIPAL reason we didn’t pursue it was the cost.
b) We didn’t want to continue the case, mostly because of PRINCIPLE.
4. AFFECT / EFFECT
a) The cost will AFFECT the final contract.
b) We know that the EFFECT of the merger will create problems.