1. Sun太阳,  Earth地球,  Moon月亮,  Mercury水星,  Venus金星,  Mars火星.

2.…….. is ……….. than ………. 

.....比.....更.....。

Sun is bigger than Earth.

太阳比地球更大。

Earth is smaller than Sun.

地球比太阳更小。

Sun is heavier than Earth.

太阳比地球更重。

Earth is lighter than Sun.

地球比太阳更轻。

Sun is hotter than Earth.

太阳比地球更热。

Earth is colder than Sun.

地球比太阳更冷。

Mercury is smaller than Venus.

水星比金星更小。

Venus is bigger than Mercury.

金星比水星更大。

Mercury is lighter than Venus.

水星比金星更轻。

Venus is heavier than Mercury.

金星比水星更重。

Mercury is colder than Venus.

水星比金星更冷。

Venus is hotter than Mercury.

金星比水星更热。

Moon is smaller than Mars.

月亮比火星更小。

Mars is bigger than Moon.

火星比月亮更大。

Moon is lighter than Mars.

月亮比火星更轻。

Mars is heavier than Moon.

火星比月亮更重。

Moon is hotter than Mars during the day.

在白天月亮比火星更热。

Moon is colder than Mars at night.

在晚上月亮比火星更冷。

3.Debate: