高一英語下冊Unit2單元復習教案1
d. digest a fly in a few hours
解析：選b。由第一段最后一句話可知b項是正確的。
2. if the trap door of a meateating plant is closed, the plant is ________.
a. fooling insects into taking a sip
b. producing nectar
c. tempting insects to come close
d. enjoying a dinner
解析：選d。根據第二段內容“once the trap door closes on the victim，the enzymes. . . slowly digest the insect”可知它在消化昆蟲，即在享受食物。因此d項符合題意。
3. meateating plants can grow in wet and poor soil because they ________.
a. can get nutrition from animals
b. don’t need much food value
c. can make the most of such conditions
d. have developed digestive enzymes
解析：選a。根據第三段第二句話可知，這種植物能夠生長在這些地方是因為它們以昆蟲為食。所以a項正確。
4. what can be captured by meateating plants for food?
a. a child. b. a dog.
c. a little bird. d. a little fish.
解析：選c。根據文章最后一句話可知，這種植物可能會捕食小鳥。
b
(XX年南京二模)how many things can you see in the night sky？a lot! on a clear night you might see the moon，some planets，and thousands of sparkling stars.
you can see even more with a telescope. and with bigger and bigger telescopes you can see more and more objects in the sky. and you can see those objects in more and more detail.
but scientists believe there are some things in the sky that we will never see. we won’t see them with the biggest telescope in the world，on the clearest night of the year.
that’s because they’re invisible. they’re the mysterious dead stars called black holes.
you might find it hard to imagine that stars die. after all，our sun is a star. year after year we see it up in the sky，burning brightly，giving us heat and light. the sun certainly doesn’t seem to be getting old or weak. but stars do burn out and die after billions of years.
as a star’s gases burn，they give off light and heat. but when the gas runs out，the star stops burning and begins to die.
as the star cools，the outer layers of the star pull in toward the center. the star squashes into a smaller and smaller ball. if the star is very small，the star ends up as a cold，dark ball called a black dwarf. if the star is very big，it keeps squashing inward until it’s packed together tighter than anything in the universe.
imagine if the earth were crushed until it was the size of a tiny marble. that’s how tightly this dead star，a black hole，is packed. what pulls the star in toward its center with such power？it’s the same force that pulls you down when you jump－the force called gravity. a black hole is so tightly packed that its gravity sucks in everything－even light. the light from a black hole can never come back to your eyes. that’s why you see nothing but blackness.