Many countries are ready to take action ................... the environment.
take action ON something
After 10 years ................ researching, the scientists has finally came to the conclusion.
after years OF something
She has been working as a consevationist for .................... 5 years.
for OVER years / decade / century
On Sunday,the museum is opened .......... 9.30 am ............ 6.00 pm.
FROM time / place TO time / place
He suddenly appeared ............... the doorway.
appear IN something
Bacteria from animals could get .................... our hands.
get ONTO something
We are studying English ............... the moment.
AT the moment
Because of the rain, our holiday turned ........... a nightmare.
turn INTO something
During the test, please think carefully .............. you choose the answers.
BEFORE something
