[ Grammar ]
The Earth’s magnetic field, ______________ protection deflects charged particles from the sun, is crucial for life.
A. where
B. when
C. which
D. whose

Random Topics:
Past Simple VerbsPast, Present, FutureSentence Adverbs & Third ConditionalA/AnUnreal ConditionalsConditional Sentences and AdverbsVocabularyPresent Simple PassiveVerb Moods and Vague PronounsConditional Sentence Type 1Other quiz:
Tenses › ViewThis is the first time we _________ by air.
A. have travelled
B. travelled
C. was travelling
D. travel
Tenses › View
Which tense is used for actions that have begun, are in progress, and will finish at some point in the future?
A. Present Perfect Continuous Tense
B. Present Continuous Tense
C. Past Perfect Tense
D. Simple Present Tense
Vocabulary › ViewThe pool was so _________ I didn’t even get my hair wet.
A. shallow
B. searching
C. attractive
D. pattern
Grammar › View
Many British people let ………. fireworks on Guy Fawkes Night.
A. up
B. on
C. off
D. in
