—Can you come and give us a talk on Thursday or Friday?—I am afraid ______ day is possible. I am very busy these days.
--- Red-crowned cranes need more people’s help.---Yes. People working in the reserves are doing everything they can ____these birds.
---I often hear a new-born baby next door __________ a lot at night.---Maybe the baby is hungry then.
About seventy percent of our earth _______ by water.
Today the forests are getting fewer and fewer. We must______ down too many trees.
What’s the sentence structure of “ Spring is warm and sunny.”?