1、【题目】Thefirstpaperwasmadefromthebarkofthemulberrytree.

选项：

A.driedwood

B.outercovering

C.syrup(sirup)

D.root

答案：

解析：

1、【题目】Thewheelsofthefirstroadvehicleswerefashionedfromcrudestonedisks.

选项：

A.hand-carved

B.roughlymade

C.flat

D.heavy

答案：

解析：

1、【题目】TheSalkvaccineisamajorfactorinthefighttoeradicatepolio.

选项：

A.completelydestroy

B.carefullydisguise

C.sustain

D.contain

答案：

解析：

1、【题目】Whencarbonisaddedtoironintheproperproportions,theresultissteel.

选项：

A.container

B.sequence

C.laboratories

D.amounts

答案：

解析：

1、【题目】Food must be moist in order to have a taste.

选项：

A.appetizing(delicious)

B.nutritious

C.damp

D.chewed

答案：

C

解析：

暂无解析

1、【题目】The megaphone(microphone) makes the voice sound louder because it points sound waves in one direction and keeps them from spreading out in all directions.

选项：

A.slithering

B.radiating

C.interfering

D.murmuring

答案：

B

解析：

暂无解析

1、【题目】Batsfly,ratherthanglide,andthusaretheonlymammalscapableoftrueflight.

选项：

A.straight

B.safe

C.real

D.rapid

答案：

解析：

1、【题目】HowmanypeopleareawarethatadancerwiththeNewYorkCityBallettypicallywearsoutaminimumoftwohundredpairsoftoeshoesperyear?

选项：

A.only

B.exactly

C.atleast

D.fewerthan

答案：

解析：