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单项选择题

A．He’s worried about whether he can finish his presentation tomorrow.
B．He’s nervous but he believes he’ll be better tomorrow.
C．He’s nervous about his presentation because he’s unprepared.
D．He’ll finish writing his presentation tomorrow.
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单项选择题Who once had to learn the Auto-Tune technique from T-Pain

A．Dixie Chicks.
B．Metallica.
C．Diddy.
D．Prince.

单项选择题In 2008, scientists encountered the top of the ionosphere all______.

A．thanks to the weak solar activity
B．because of the advanced CINDI
C．by chance
D．as predicted

单项选择题The author gave it his best shot because ______.

A．he was very competitive then
B．he was grateful to Mr. Priestley
C．his classmates had great faith in him
D．it took him a long time for preparation

单项选择题A．She thinks she is behind in her study.B．She only has time to study in the evenings.C．She has no time to study in the evenings.D．She thinks work is easier than study.

A．She thinks she is behind in her study.
B．She only has time to study in the evenings.
C．She has no time to study in the evenings.
D．She thinks work is easier than study.

单项选择题A．ingredientB．incidentC．illusionD．impression

A．ingredient
B．incident
C．illusion
D．impression

单项选择题What has happened to T-Pain since 2005

A．He went out of fashion soon.
B．He had to give up Auto-Tune.
C．He became very successful.
D．He held concerts worldwide.

单项选择题The author found it the most embarrassing that ______.

A．he had to practice the poem in front of the class
B．he had to put feeling and emotion into the poem
C．his mistakes were pointed out by Mr. Priestley
D．his practice was appreciated by Mr. Priestley

单项选择题In order to predict distortions, scientists need to______.

A．improve the severity of radio, radar and navigation signals
B．improve the accuracy of the satellite-based systems
C．study the charged particles in the ionosphere
D．study the thick regions in the ionosphere

单项选择题A．His stereo disturbs himself, too.B．His stereo sounds like dog barking.C．The neighbors aren’t justified in complaining.D．The neighbors don’t appreciate music at all.

A．His stereo disturbs himself, too.
B．His stereo sounds like dog barking.
C．The neighbors aren’t justified in complaining.
D．The neighbors don’t appreciate music at all.

单项选择题A．faultyB．defectiveC．mistakenD．wrong

A．faulty
B．defective
C．mistaken
D．wrong