[ Passive Modals ]
People —- (not explain) some UFO sightings easily. No one is able to explain them easily.
A. cannot be explained
B. cannot explain
C. cannot been explained
D. cannot explained
Random Topics:
Relative Pronoun/AdverbsPast Perfect vs Past SimpleModals for Advice, Obligation/Prohibition, Necessity and Lack of NecessityConditionals and Modals of ProbabilityVerbs & Verb TensesPresent Perfect Simple and ContinuousPast Tense vs Present Perfect TenseConditional Typesa, an, the, zero articleEssential and Nonessential ClausesOther quiz:
Relative Clauses Pronouns › ViewThe book __________ I thought I lost was under my bed.
A. who
B. which
C. whose
D. where
E. when
Past Continuous Tense & Past Modals › View
While I was drinking tea, I … a glass
A. was broking
B. broke
Grammar › ViewThe student ____ homework is due tomorrow needs to complete it tonight.
A. whose
B. which
C. who
Grammar › View
Choose the correct spelling below.
A. discover
B. discaver
C. descover