Martin Cooper , a US researcher , was considered _______ the first cell phone .
The Diaoyu islands have been part of China's territory since ancient times, ________ as important fishing grounds of Taiwan.
In order to jump, your body changes the chemical energy ________ in the food you have eaten into mechanical energy.
With all the books he was interested in ________, he left the library and went back to his dorm.
They suggested that the professor ________ just now ________ chairman of the meeting.
—Can you introduce me a high quality machine?—My pleasure. ________ well even on wet roads, this kind of car is very popular.