[ Science ]
What is the level of nitrogen in the atmosphere of the Earth?
A. 70%
B. 15%
C. 7%
D. 5%
E. 2%

Random Topics:
Adverbs by TypeConjunctions & Cohesive DevicesContrastive ConjunctionModals and Active and Passive VoiceUnscramble SentenceShould and Shouldn'tPassive Voice - Past SimpleSimple Past Irregular & NegativeSimple Future TensePresent and Past Simple PassiveOther quiz:
Will and Going to › ViewWhich sentence uses ‘will’ for future prediction?
A. ‘I think it will rain later.’
B. ‘I am going to eat pizza for dinner.’
C. ‘She will go to the store after work.’
D. ‘They are going to have a picnic tomorrow.’
Verb Tenses › View
What is the past tense form of the verb ‘sing’?
A. brought
B. shall
C. sang
D. will
Grammar › ViewIdentify the interjection in the following sentence: “Wow, what a beautiful sunset!”
A. Wow
B. what
C. beautiful
D. sunset
Simple Past/Past Progressive › View
I believed my friend when she ____ she was sorry.
A. were saying
B. was said
C. said
D. was saying
