2.make the statements interrogative make the statements negative 1) bob was writing a letter at 5 p.m 2)it was snowing when they returned home 3)the wind was blowing from the east 4)it was raining the whole day yesterday 5)the boys were talking when i saw them 6)nick was writing for mary when we saw them 7)mary was singing when he came home 8)it was snowing hard when father returned home from the office 9)the car was moving quickly when someting wrong happened 10)i was watching pirates of the caribbean at noon yesterday

1) He usually (goes) to school by bus, but today he (is walking) to school. 2) Listen! The birds (is singing). They always (sing) in the morning. 3) What (are you / doing)? Do you always (work) like that? 4) I (do not / swim) in this lake! It (is) far too cold. 5) Peter (has just / eaten) his school dinner, but I (think) school dinners (taste) horrible. 6) The girls often (do) their homework together, but today they (are not / doing) their homework properly! 7) I sometimes (go) for a walk in the afternoons, but today I (am working) instead. 8) Christiana always (feeds) her cows in the morning, but Tim (is feeding) them today. 9) Look! (Isn't ) that Sarah? She (is just / going) into the cinema with her boyfriend. 10) Dad (does not / know) that Tom (has run) in a marathon today. He will be surprised.

Есть и положительные, и отрицательные стороны.
Сезонные фрукты и овощи, находящиеся на рынке, 100% будут свежими.
Привезенные же могут быть подпорченными, с различными вредными веществами.
С другой стороны, все-таки больше, на мой взгляд, отрицательных сторон, ведь, не имея возможности купить те или иные продукты, мы страдаем от недостатка витаминов, содержащихся в этих продуктах.
Но в то же время, если искать ответ в истории, то ведь наши предки жили припеваючи, не имея возможности хранить особо портящиеся продукты, а значит, и мы может, разве нет?

В общем, палка о двух концах, на мой взгляд, и немного трудно категорично заявить плохо это или хорошо.