33. Ive a
letter from my parents for a long time.
A. got
B. heard C.
received D. had
B)完形填空 (共10小题,每小题1分,满分10分)
先通读下面的短文,掌握其大意,然后在每小题的A、B、C、D四个选项中选出最佳选项。
We know that trees
are useful in our everyday life. They 34 us many
things, such as wood, oxygen, rubber, medicines and many other things. They can
35 tell us a lot about our climate. The
following are the reasons. If you 36 a tree, you Can
see that it has many rings . Most trees grow one new ring
37 year. Because of this reason, we know 38
a tree is. A tree over a hundred years old means that it has more
than a hundred 39 . When the climate is dry or very
cold, the trees do not grow very much and their rings are usually 40
. When it is wet and warm, the rings are much thicker. If the rings are
suddenly very thin or suddenly very thick, this means that the 41
Changed suddenly. If we look at the rings on this tree, we can learn about
the 42 for a hund
red years. We can see 43 our climate is
changing today.