1, cho due to vào chố dấu chấm

we can't ....at night due to there is too....

2, if the factory weren't located near our village, there wouldn't be air pollution.....

3, the last time PHong visited Tasmania was 15 years ago.

4, By the time I haf left, he came to my house last night.

1, We can't see the stars at night due to there is too much light pollution

2, If the factory isn't located near our village, there isn't air pollution and noise pollution.

3,  the last time Phong visited Tasmania was 15 years

4, By the time he came to my house last night, I had left