__________ the teacher explains the concept, the students won’t understand it.
A. Until
B. Unless
C. Although
D. Before

Random Topics:
Past TensesVerb TenseComparative and Superlative AdjectivesMust / must notNouns and QuantifiersGrammar: wishes and regretsAsking for and Giving OpinionPresent, Past, Present Perfect and ComparativeAdjective + to + VerbModal AuxiliariesOther quiz:
First Conditional › ViewIf you …. how to cook, …… dinner for me?
A. won´t learn / will you prepare
B. learnt / will you prepare
C. learns / will you prepare
D. learn / will you prepare
Grammar › View
Choose the correct verb:
Amy likes to _______ chess during her free time.
A. playing
B. plays
C. play
D. played
Reported Speech › ViewHarold said, “Don’t bring sodas near the computers!”
A. Harold told us not to bring sodas near the computers.
B. Harold asked us if we were bringing sodas near the computers.
C. Harold told to us that we had bringed sodas near the computers
D. Harold said to bring sodas near the computers.
Grammar › View
He _____ want to go to the party tonight.
A. Do
B. Does
C. Don’t
D. Doesn’t
