ACCORDING TO THE PASSAGE, HOW DID EDISON TEST HIS NEW INVENTION

50.According to the passage, how did Edison test his new invention?

A.He made improvements to the machine.

B.He used a carbon transmitter.

C.He read a children’s rhyme.

D.He reproduced the audience’s voice.

Fill each blank with a suitable word to complete the following passage.

Everybody needs a little tender, loving care – even planet Earth! Earth Day reminds us

that we need to (51)_______ the Earth’s beauty and natural resources. Earth Day is

(52)______ every year on April 22. Earth Day started on college campuses (53)________

the US in 1970. Gaylord Nelson, a senator from Wisconsin, had inspired the efforts of

college students. A lot of people felt that the (54)_______ was in real trouble in 1970.

Human beings were the cause of much -of the trouble. Accidental spills from oil tankers

had poured millions of gallons of oil (55)_______ the Gulf of Mexico. The oil polluted the

water and harmed sea life. Poisonous mercury was found in fish and wildlife in many

(56)______ around the world. Factories had released this mercury. No sea life existed off

the polluted shores of New York and New Jersey. Heavy gray smog hung over America’s

cities. The (57)_____ of rainforests and other habitats endangered thousands of animal and

plant species around the globe. People needed to wake up and learn (58)______ they were

doing to their planet! Earth Day raises awareness of our planet’s problems. Millions of

school children (59)______ in Earth Day projects. Each Earth Day, people who study the

environment report on the (60)________ that face our planet. Earth Day pushes people to

look for ways to slow, or even reverse, the damage we’ve done.

Complete the following sentences using one of the following combinations.

away with

on with

down on

up to

back on

up for

in with

out of

down with

away from