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

Random Topics:
Will and Will notModals Posibility and ProbabilityVerb Tenses and Sentence StructurePresent Perfect & Past Simple TenseFrequencyTimeContrastive ConjunctionDefinite and Indefinite ArticleParts of SpeechConditionals and WishesOther quiz:
Grammar › ViewHow many brothers and sisters have you got?
A. How many
B. How much
C. How few
D. How some
Grammar and Sentence Structure › View
. Which sentence uses ‘during’ correctly?
A. During she was at university
B. During university she studied
C. During her university years, she studied hard
D. During in university, she studied
Grammar › ViewIf I can _____ enough money, I’ll buy a new computer.
A. save
B. saving
C. saved
D. will save
Grammar › View
English Grammar. Select the best answer.
Alecx, __________ the windows please. It’s too hot in here.
A. Opens
B. Open
C. Opened
D. Will opened
