Topics: Tenses
Scientists believe they ___ life on the planet outside our solar system by the end of this decade.
A. will be discovering
B. are discovering
C. have discovered
D. would discover
E. will have discovered
Select your answer:

Random Topics:
Simple Past/Past ProgressiveObject PronounsPhrases and ClausesSimple Present and Past TensesPerfect TenseVerbs and AdverbsThere is or There areWish - beginnerPast Simple TensesModal and Relative PhrasesOther quiz:
Grammar › ViewI like swimming ______ my sister likes jogging and dancing.
A. whereas
B. when
C. whenever
D. so
Tenses › View
What were they doing at the park yesterday?
A. They were playing.
B. They played.
C. They plays.
D. They play.
