[单项选择]My mother is a light sleeper and is usually very ______ to any sound even as inaudible as the humming of a mosquito.
A. acute
B. keen
C. alert
D. immune

[单项选择]A light sleeper is usually very ______ to any sound even as inaudible as the humming of a mosquito.
A. acute
B. keen
C. alert
D. immune

[单项选择]Jack's mother was very angry because Jack had a telephone but she hadn't.

[单项选择]—My mother is preparing my favorite dishes. Go with me and have a taste, okay
—______. And I'll be glad to meet your parents.

[单项选择]Susan' s mother is very particular ______ the plates she uses for the party.


A. for
B. about
C. to
D. in

[单项选择]The mother flatly rejected my suggestion that she ______ her daughter the next week.
A. meet
B. would meet
C. met
D. had met

[单项选择]Mother kept telling my little brother to study hard, but ______ didn't work.


A. that
B. it
C. which

[单项选择]My mother is a light sleeper, ______ to any sound even as low as the humming of a mosquito
A. alert
B. acute
C. keen
D. immune

[单项选择]

Text 4
"My very educated mother just served us nine pizzas." Many American school children are taught this sentence to help them remember the order of the planets of the solar system. Soon though, this may change because, on July 29th, a team of astronomers announced the discovery of a very distant celestial body larger than Pluto. The researchers claim that the new body--which they are informally calling Xena--should be classified as a planet.
The new body--temporarily named 2003UB313--orbits the Sun once every 560 years. It is currently over 14 billion kilometres away, about three times farther out than Pluto, making it the most distant object ever discovered in the solar system. The researchers think it is part of the Kuiper belt, a ring of rocky objects that extends beyond Neptune.
Mike Brown of the California Institute of Technology, Chad Trujillo of the Gemini Observatory and David Rabino witz of Yale University discovered the object
A. it represents typical American culture.
B. it represents nine planets in the solar system.
C. it is often used in teaching astronomy.
D. it is a good example of mnemonics.