Air pollution is getting more and more serious in _______ big cities such as Hanoi and Beijing.

Twelve-year-old Eloise Noakes has got the best job in the world – (34) ­­­­­_______ out new games.

In the sustainable agriculture, farmers try _______ the use of chemicals and fertilizers. 

Yesterday the naval authorities _______ the reports in Friday’s newspapers that they had exploded three bombs near an unknown submarine.

An important rule in Tim's family is that they have to pay _______ visits to their grandparents in the countryside.

She had been depressed all day but she started to _______ after she heard that she was promoted.

To many children, playing computer games is a form of _______.   

The trees _______ more and more in our countryside next year.