本周的主题是各种飞机：planes（美式英语airplane / 英式英语aeroplane 的简略写法，就像bicycle,一般都说成bike)
那文中都提到了哪些飞机相关的呢？
jet/jet plane 喷气式飞机
seaplane 水上飞机
helicopter/chopper 直升机
cargo/transport plane运输机
control tower 控制塔
runway 跑道
补充一些小知识：
目前，美军的机种代号主要有:A-攻击机，B-轰炸机，C-运输机，E-电子设备机（包括雷达警戒、电子对抗、空中指挥和空中通信等），F-战斗机，H-直升机，K-空中加油机，S-反潜机，R-侦察机等。使用序号采用阿拉伯数字，写在机种代号之后，一般用来表示使用或设计的顺序。如F-14表示设计代号为14的战斗机，B-70表示设计代号为70的轰炸机。这些机种代号分别指什么呢？
A- attacker 攻击机/强击机
B- bomber 轰炸机
C- cargo plane 运输机
E- electronic plane电子设备机
F- fighter jet 战斗机
H- helicopter 直升机
K- air refueling tanker空中加油机
S- anti-submarine plane 反潜机
R- reconnaissance plane侦察机
T- trainer 训练机
无人机：
drone/UAV (Unmanned Aerial Vehicle)
以下是正文。先通读一遍，看能读懂多少。通读之后猜测句子生词的意思，最后再查词典看是否和猜测相近，以锻炼阅读理解～
Planes
In the sky
airplanes are flying.
This is a jet plane with people inside.
Here is a seaplane landing on water.
There is an airplane dusting the crops.
There is an airplane writing a message.
Here is a helicopter over the city.
This is a cargo plane loading trucks.
Here is the jet coming in for a landing.
Here are the passengers leaving the plane.
These are workers cleaning and checking.
Here is a truck loading supplies.
Here are the people getting on board.
There is the control tower.
Get ready for takeoff.
Here is the jet plane on the runway.
There goes the jet plane into the sky.
