1choose the best sentence for the situation. i'min the bathroom! i wash my hair. b i'm in the bathroom! im washing my hair. a a 2 this maths problem is difficult. do you know the answer? b 3 this maths problem is difficult. are you knowing the answer? a do you wait for the school bus? you're in the wrong place! b 4 are you waiting for the school bus? you're in the wrong place! a look at that bike! it costs £350. b look at that bike! it is costing e350 5 a do you understand this exercise? b 6 are you understanding this exercise? a sorry, i'm busy. i do my homework. b sorry, i'm busy. i'm doing my homework.

1. The best sentence for the situation is "B. I'm in the bathroom! I'm washing my hair." This sentence uses the present continuous tense to describe the current action of washing the hair in the bathroom.

2. The best sentence for the situation is "A. This maths problem is difficult. Do you know the answer?" This sentence uses the present simple tense to ask if the person knows the answer to the difficult math problem.

3. The best sentence for the situation is "B. Are you waiting for the school bus? You're in the wrong place!" This sentence uses the present continuous tense to ask if the person is currently waiting for the school bus and provides the information that they are in the wrong place.

4. The best sentence for the situation is "A. Look at that bike! It costs £350." This sentence uses the present simple tense to describe the cost of the bike.

5. The best sentence for the situation is "A. Do you understand this exercise?" This sentence uses the present simple tense to ask if the person understands the exercise.

6. The best sentence for the situation is "B. Sorry, I'm busy. I'm doing my homework." This sentence uses the present continuous tense to describe the current action of doing homework and explains why the person is busy.