Fill in: about, on, up, back. 1 Technological advances have brought many changes. 2 Too much sun broughtmy headache.

1 about (bring about - вызывать, осуществлять)
2 on (bring on - вызывать, влиять)
3 back (bring back - возвращать)
4 up (bring up - воспитывать)
5 back (bring back - возвращать)