—How many birds can you see in the trees?—I can see birds in them.
I think there won’t be ______ schools in the future.
I think he will come back ______ three days.
We will use ______ and get ______ on the Internet.
---What is Mr Zhang doing? ---He is writing some English words ______ the blackboard ______ chalk.
My old neighbor felt _______ after her son moved out.