[ Past Modals ]
They _______ have seen the sign, but they ignored it.
A. could
B. could have
C. must
D. may

Random Topics:
Future Simple TensesWill or Going toIrregular Plural NounsModal Verbs in Emergency SituationsInterrogative Pronouns & AdverbsWorld Literature VocabularySimple PastMust Vs Have toQuantifiers & Modals of ObligationGrammar (either..or.. and neither..nor..)Other quiz:
Adverb of Manners › ViewMom can chop the union ___________.
A. perfect
B. perfectly
used to vs be used to vs get used to › View
Ivan … speak a lot. He doesn’t speak much now.
A. use to
B. am used to
C. is used to
D. used to
