[ Vocabulary ]
______________ are ways that scientists perform investigations.
A. control
B. experiment
C. scientific methods
D. variable

Random Topics:
Language Features: Reflective ArticleTOEICPresent Simple & Present ContinuousThings in EnglishSubjective and Objective PronounCan, Could, May, MightVerbs + Gerund or InfinitivePaired ConjunctionFigurative Language VocabularyPast and Present ContinuousOther quiz:
Grammar › ViewJoe _____ a piece of cake after lunch yesterday.
A. eat
B. ate
C. eats
D. eating
Grammar › View
It’s time you tidied your room. It’s getting ____.
A. messier and messier
B. more Messier and messier
C. more messy and messy
D. more and more messy
Grammar › ViewA parrot is ……… than a pigeon.
A. colourful
B. most colourful
C. as colourful
D. more colourful
Grammar › View
_______ you are hungry, I will share my food with you.
A. But
B. Although
C. Since
D. And
