[ Grammar ]
_______ ________ never __________________.
A. They / explore a cave.
B. We have / explore a cave.
C. We have / explored a cave.
D. We have not explore a cave.

Random Topics:
Present Perfect Simple and ContinuousAdjective ClausesParts of SpeechPassive VoiceCountable and UncountableWho or WhomGerund/ To Verb/ VerbModals and Comparative SuperlativeArticlePresent TensesOther quiz:
Grammar › ViewIt was late, so we decided _______ a taxi home.
A. to take
B. taken
C. taking
D. was taken.
Adjective › View
I was … to know that everybody was fine.
a.pleased
b. pleasing
Present Perfect Simple and Continuous › ViewPeeta and Katniss _____________ to the Hunger Games twice.
A. has been
B. have been going
C. have been
Verb, Object, Preposition › View
Thank you _______ your support.
A. on
B. for
C. from