'Silent Spring' Turns Fifty In the 1950s, the U.S. Department of Agriculture was spraying more than a quarter-million kilograms of pesticides each year. Silent Spring, by Rachel Carson, revealed that pesticides like DDT were lethal not only for insec...
[00:06.46]2 Pronunciation [00:09.13]A Listen and say. [00:12.99]Happy Spring Festival! [00:16.18]That's the same as my old school. [00:20.06]How long does the journey take? [00:23.54]How do you go to school? [00:26.82]B Listen and say. [00:30.69]he s...
[00:02.20]Module 1 SCHOOL LIFE [00:05.17]UNIT 1 There are fifty students in the class. [00:11.04]1 Listen and read. Then say. [00:15.90]Happy Spring Festival, Feifei! [00:18.40]Happy Spring Festival, Susan! [00:20.75]Today, is my first day at your sc...
