Вкаких предложениях нужно писать are а в каких is?

1) Mary was not at school on Monday because she was ill.  Мэри не была в школе в понедельник, потому что она болела. Past simple

2) Where did you buy this jacket? Где ты купил эту куртку (жакет)? Past simple

3) What time does he usually take a shower?  В какое время он обычно принимает душ? Present simple

4) They do not know French very well and that is why they often use a dictionary. Они не очень хорошо знают французский, и поэтому они часто пользуются словарём. Present simple

5) Do you go to school on Saturdays? Ты ходишь в школу по субботам? Present simple

1) I think, we would have soulless world without any kind of sensations

2) Sight, hearing, taste, touch, smell

3) On whole body

4) With vision we can see

5) Sound signals enter the ear canal and cause the eardrum to vibrate. The vibrations of the eardrum set in motion three ossicles. Through the auditory ossicles, vibrations are transmitted to the fluid of the inner ear

6) The skin contains a type of receptor called touch. We can sense the environment with our body

7) It's major concept of our senses that consist many low senses. It is reason.

8) Sweet, sour, bitter, salty and umami

9) Sensations define perception and on the contrary.