[ Tenses Usage ]
The scientist _____ solutions to clean polluted rivers when she discovered a breakthrough.
A. researched
B. was researching
C. had researched
D. is researching
Select your answer:
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Present, Past, Present Perfect and ComparativeConditionals 1,2,3Be used to vs used toFirst Conditional, Future Time ClausesGrammarVerb BECompound AdjectivesTimePresent / Future / Present Progressive / non Action Verbs
Other quiz:
a, an, the, Zero Article › ViewHe spent _________ most of his spare-time learning English.
A. A
B. An
C. The
D. Nothing
Modal Verbs › View
I don’t think Max broke your vase because he wasn’t here then.
A. Max wouldn’t have broken your vase because he wasn’t here then.
B. Max was likely to break your because wasn’t herethen.
C. Max can’t have broken your because wasn’t here then.
D. Max wasn’t to break your because wasn’t herethen.
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How to use : Read the question carefully, then select one of the answers button.