68. The village seemed deserted, the only sign of life ___ (be) some trees waving in the howling wind. 69. ___with better communication ability is more likely to succeed in his career. 70. Until we have discussed all the details, no decision___ (make) about any new operations. 71...
when Paul Hermann Müller discovered its effectiveness at killing pests. He wasawarded the Nobel Prize in Medicine in 1948for his discovery, and DDT was widely used through the 1960s. It wasn’t until Rachel Carson published her famous book "Silent Spring" in 1962 that...