Grammar Quiz
[ Grammar ]

Scientists ………. life on other planets yet.

A. didn’t discover

B. haven’t discovered

C. aren’t discovering 

D. don’t discover

Select your answer:
         


Random Topics:

ComparisionAll, Both, Neither, None, EitherRelative Clauses beginning with PrepositionsConjunctions, Prepositions and InterjectionsAction, Helping & Linking VerbsAdverb ClauseComparison of Adjective and AdverbComparatives or SuperlativesAdjectives with -ED and -ING

Other quiz:

Phrasal Verbs › View

 enter

A. go in

B. go by

C. go ahead

Present Perfect Tense › View

The cake … by him

A. has eaten

B. have eaten

C. has been eaten

D. have been eaten

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