The number of children who have lost parents to AIDS ___ to rise to over 26 million in 2017.
The firefighters tried their best to________the forest fire.
The first question is________harder than the second one.
—The little girl________her seat to an old man on the crowded bus. —How kind she is!
If you want to study abroad,why not consider________to Australia?
Lisa remembered________her mother.But her mother hash’t received the letter.