_____ doing more exercise to lose weight, many teenagers would rather be a couch potato.
Mum ,watch your fish .I smell something____
Never in my life I forget the days ____we used to play together when we were children.
__seems easy to some people seems difficult to others .
The twins,______at birth,do not know each other .
______to looking after her sick father for 2 years ,she badly needed a holiday.