[ 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
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 › 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