Martin Cooper , a US researcher , was considered _______ the first cell phone .
Furthermore,students have to pay postage to send letters,something the students might be___
She___her parents’ decision at last
—___does much good to your health—Thank you for your advice,and I must stop smoking as you say
There are laws in some coutries which prohibit advertisements from___at inappropriate time and places
I am going to the bottom of this!I___hanging back(退缩)