[ Vocabulary ]
The Force that opposes motion between two surfaces that are touching each other.
A. Unbalanced Forces
B. Force
C. Balanced Forces
D. Friction
E. fulcrum

Random Topics:
Comparative and Superlative AdverbsPossessive Adjectives and Possessive PronounsPre-intermediateDeterminersNoun / PronounTransitional Phrases and ConjunctionsPast simple - Irregular VerbsFuture Tense (will/be going to/p.continuous)Subordinating and Coordinating ConjunctionsTypes of SentencesOther quiz:
Adverbial Clauses › ViewI’m sorry about the delay, but I will be back ______.
A. after I had checked this
B. as soon as I have checked this
C. while I was checking this
D. when I checked this
Modals of Prediction › View
I am very certain. He ______________ accept the job offer.
A. might not
B. probably won’t
C. definitely won’t
Articles and Quantifiers › ViewShe has lots of friends, but ____ of them will help her.
A. all
B. neither
C. none
Vocabulary › View
What is the closest meaning of trivial?
A. Insignificant
B. Important
C. Critical
D. Substantial
