The weather is getting . A: warmer and warmer B: warm and warmer

The fact has worried many scientists _______ the earth is becoming warmer and warmer these years.

35）There seems to be no debate about the ________ that the world will be warmer and warmer if we keep pumping large amounts of greenhouse gases into the atmosphere.

It gets ______ when summer comes. A: warmer and warmer B: cooler and cooler C: hotter and hotter D: hot and hotter

The fact has worried many scientists ______ the earth is becoming warmer and warmer these years. A. what B. which C. that D. though

Some birds to warmer places when winter comes.

35）There seems to be no debate about the ________ that the world will be warmer and warmer if we keep pumping large amounts of greenhouse gases into the atmosphere. A: preposition B: proposition C: persuasion D: perception

1. The passage of very cold air over much warmer water causes ______.

中国大学MOOC: Some birds _____ to warmer places when winter comes.

Approximately, how much warmer has the Earth become over the past 200 years?