Linda is thirteen ________ old. She is my friend.
animals are in danger and there will be space for them if we don’t take any actions.
——The birdwatching is very boring, isn’t it?——_____________ . I only see few birds.
Many birds are out of ____________ now, because we have done a lot of things to protect __________ birds.
——_____________ does she weigh? ——Her ______________ is 50kg.
The sentence structure of “Teachers ask me to finish the homework on time” is ____________.