[ Grammar ]
My children often sleep while they are …………. a plane.
A. on
B. in
C. by
D. x

Random Topics:
Correlative ConjunctionEssential and Nonessential ClausesPresent Perfect - Just, Already, YetComparative - SuperlativeSentence StructurePast Tense and NeutralOn, At, ByTenses and StructuresPronouns and AdverbsAuxiliary and Modal VerbsOther quiz:
Vocabulary › ViewWhat is the definition of “grimace”?
A. A broad smile
B. A facial expression of pain or disgust
C. A type of dance
D. A loud laugh
VERB TO BE › View
in/ English class / we/ are
A. We are in English class
B. class are in English We
C. English We class are in