阅读下面短文，掌握大意，然后从每小题所给的A、B、C、D四个选项中选出最佳选项。

Matt loved science, and he wanted to be the Science Star of the week. Now he was presenting his experiment in Mrs. Perry’s class.

“Let me show you ____（1）____ to keep an egg in the middle of the glass.” Matt dropped an egg into salt water. But it fell to the bottom.

“Look, Matt’s blushing!” Coco shouted. Matt, covered ____（2）____ red face with hands.

That evening he ____（3）____The Book of Wonderful Science Experiments. When it came to the last page, he smiled. “This is the right experiment ____（4）____ me! It’s impossible to fail this time.”

The next day in front of his class, Matt spread small pieces of paper onto the desk and rubbed a spoon with cloth. “The spoon will lift up the paper.” He raised the spoon, but ____（5）____ happened. The paper lay still.

“Matt’s blushing again!” Emily pointed out. Matt was ____（6）____ and ran back to his seat with his red face.

“Becoming the Science Star seems so ____（7）____,” Matt thought. That night he couldn’t sleep, “I have to make it, but the only thing I could do right was blushing.” … Suddenly, a ____（8）____ came to his mind.

The following morning, Matt appeared before the class again, ____（9）____ his Mickey Mouse ears.

“Mouse ears on the head are your ____（10）____?” Someone laughed and Matt’s face burned.

“No, watch my ____（11）____! Blushing is my experiment,” Matt answered. Everyone quieted down.

Matt continued, “When you feel stressed, your blood vessels in the face open wide and fill the skin with blood, ____（12）____ you blush.” He showed a picture of blood vessels. “I’ve ____（13）____ many times to control blushing, but now I know it’s a normal part of being human. So the best thing to do is to ____（14）____ it.” The class cheered and Matt’s red face lit up the whole classroom.

“Matt is the Science Star of the week,” Mrs. Perry announced. Matt walked ____（15）____ back to his seat. What a perfect day!

（1）

A．

how

B．

where

C．

why

D．

when

（2）

A．

my

B．

your

C．

his

D．

her

（3）

A．

handed in

B．

looked through

C．

waited for

D．

put away

（4）

A．

for

B．

with

C．

against

D．

like

（5）

A．

something

B．

anything

C．

everything

D．

nothing

（6）

A．

happy

B．

nervous

C．

calm

D．

bored

（7）

A．

difficult

B．

common

C．

natural

D．

safe

（8）

A．

question

B．

number

C．

plan

D．

mistake

（9）

A．

passing

B．

throwing

C．

wearing

D．

repairing

（10）

A．

play

B．

song

C．

painting

D．

experiment

（11）

A．

hands

B．

face

C．

teeth

D．

back

（12）

A．

whether

B．

so

C．

unless

D．

but

（13）

A．

tried

B．

advised

C．

guessed

D．

cried

（14）

A．

finish

B．

change

C．

hide

D．

accept

（15）

A．

secretly

B．

strangely

C．

proudly

D．

worriedly