Betty, could you answer my question? — Sorry, Mr. Green. I didn’t hear you. I _______ about something else.

If it ________ fine tomorrow, I will go hiking with you.

We can get fresh water from rain, from rivers, or from _______ the ground. [ ]

Mr Green, do you know_______? ——July 10,It will last a month.

I have ________ dictionary and I use it every day.