内容正文:
UNIT 5 课时跟踪检测(一) 阅读理解专项练
Ⅰ.阅读理解
A
I bought several packs of seeds, 24 small plastic seed pots, plant fertilizer and potting soil.I made sure the soil didn't contain added fertilizer.I wanted something that I could grow quickly, that wouldn't take up a lot of space and that wouldn't get too big.I ran this experiment in early fall in Maryland.So I knew I needed a plant that could grow when it's cool.I picked radishes (小萝卜), which grow well in the early fall or spring.Some varieties can grow a full radish in only 21 days.
I kept 12 of the pots and one pack of seeds for myself.I gave the other 12 pots and the other pack of seeds — along with some fertilizer and soil — to my editor, Sarah.This was to provide an additional control for location.After all, what if my yard just happens to be much better for growing plants? What if it's worse? By dividing the plants up between my yard and Sarah's, I hoped to make sure that any difference with the plants came from the fertilizer.
Sarah and I planted our seeds.Sometimes, seeds don't sprout (发芽).So we carefully planted four evenly (相等地) spaced seeds in each pot.Six of my pots (and six of Sarah's) served as controls — pots that would not get fertilizer.Our other six were treated with fertilizer.For each of us, this added up to 24 control seeds, and 24 seeds that would get fertilizer.
We watered all the plants equally with clean water every other day (unless it rained).Once a week, we applied fertilizer to half the pots.We also took pictures every day, so we could see the plants change over time.As I expected, many of our seeds didn't sprout.In fact, only about a fourth of mine sprouted.Sarah has a green thumb.She successfully grew half of hers.
语篇解读:本文是一篇夹叙夹议文。作者通过讲述在院子种植植物的全过程以及与同事萨拉的种植对比来说明自己要做的一个实验,并以此来说明科学种植的重要性。
1.Why does the author want to grow such a plant?
A.To enjoy it.
B.To make it very cool.
C.To take up more space.
D.To make an experiment.
解析:选D 细节理解题。根据第一段中的“I ran this experiment in early fall in Maryland.So I kne