[ TOEFL ]
The upper levels of the sun’s atmosphere are of very low ______ heats the gases there to very high temperatures.
A. dense and solar
B. density, solar activity
C. density, but solar activity
D. density and the activity of the sun is
Select your answer:
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Quantifiers › ViewDo you ____ time reading in English and listening to podcasts?
A. pass much
B. pass a lot of
C. spend many
D. spend much
Modals › View
You _____ memorise the whole thing. Just try to remember the key points.
A. have to
B. don’t have to
C. mustn’t
D. can’t