Finding food used —- the biggest challenge for ancient people. They spent most of their time for it.
A. to be
B. to being
C. being
D. be

Random Topics:
Adverbial Clause of ConcessionPresent Simple and Present ContinuousPresent and Past Simple TenseSentence and FragmentGrammar (Possessive Pronouns)Action VerbGrammar - Be going toPreposition after some VerbsSimple Tenses in EnglishPast Tense (Regular and Irregular)Other quiz:
Grammar › ViewHe hurt himself falling off his bike. I wonder ____________ he’ll be able to take part in the match tomorrow.
A. if
B. how
C. when
D. that
Grammar › View
Grammar: Section 1. Passive or Active Voice. Choose the correct option for the active and passive sentences.
I remember my sister helping me in the nick of time (en el último minuto).
_
A. I remember I was helped by my sister in the nick of time.
B. I remember myself being helped by my sister in the nick of time.
C. I remember being helped by my sister in the nick of time.
D. I remember helped in the nick of time by my sister.
Vocabulary › ViewHis ability to handle stressful situations calmly and make quick decisions shows how ____.
A. rebellious
B. decisive
C. unreliable
D. childish
Modals and Advice › View
May I borrow your pen for a moment?
A. Sure, here you go.
B. I need it myself.
C. I can’t lend it to you right now.
D. Sorry, I don’t have one.
