(
A.strongest
B.funniest
C.healthiest
D.luckiest
D
) 1. Liu Yi has just got the only chance to visit Peking University. She is the ______ student in the class.A.strongest
B.funniest
C.healthiest
D.luckiest
答案：D
C
2. Mr Black doesn't smile often. But he is actually a ______ man.A.healthy
B.busy
C.funny
D.shiny
答案：C
(
A.funny
B.noisy
C.dirty
D.sleepy
D
) 3. The movie was really boring. I even felt ______ when watching it.A.funny
B.noisy
C.dirty
D.sleepy
答案：D
1. What is weather?
2. What is the atmosphere made of?
3. What can fall from clouds when the temperature is above 0°C?
4. How do snowflakes form?
5. Why are rain and snow important for life on earth?
It's the condition of the atmosphere at a particular place and time.
2. What is the atmosphere made of?
It is mostly made of air.
3. What can fall from clouds when the temperature is above 0°C?
Rain.
4. How do snowflakes form?
The ice crystals fall from the cloud and stick together.
5. Why are rain and snow important for life on earth?
Because they bring water back into lakes, rivers and seas.
答案：
1. It's the condition of the atmosphere at a particular place and time.
2. It is mostly made of air.
3. Rain.
4. The ice crystals fall from the cloud and stick together.
5. Because they bring water back into lakes, rivers and seas.