______ is known to us is that tobacco contains nicotine and other harmful products, so you should give up smoking.
Whenever I arrive home from study, I will first ______ my favorite DVD and then do my homework.
── Do you know our town? ── No, this is the first time I ________ here.
I have many friends,some re teachers.
The plane ________ when I arrived at the airport.
_____ is a possibility _____ Tom will get first place in the long jump.