We have planted many trees in order to ____wind and sand in the desert.
---- Is there a vaccine _____ pig influenza?, I’m anxious to know. ----- Don’t worry, there is a vaccine _____ for pigs against pig influenza
Has she had a cold like pig flu. _____? for she is absent.
The teacher criticize me, so I must finish my essay about agriculture,farmer and rural areas today______.
----- Would you like to climb the Mountain Tai on May Day? _____, I’d like to.
He is only too ready to help others, seldom, ____, refusing them when they turn to him.