While we ________ an English song, some visitors came into our classroom.
were singing
sang
are singing
The group of trees provided some shade __________ the sun __________ us.
Wild animals have __________ living areas. Instead, the number of the farms is getting _________.
Everything comes to life when spring __________.
Thanks to the rescue service’s timely arrival, we are still __________ after the terrible natural disaster.
Vivien worked very hard at all her lessons. __________, she became the top student in her class.