Use a modal to make a past deduction in the following sentence: ‘The train arrived late, so it ____________ have been a signal problem.’
A. must have
B. should have
C. could have
D. might have

Random Topics:
ExclamationModals and Present TensesCompound AdjectivesGrammar and ReadingConditionalGerund vs InfinitivePresent ContinuousModals in the PastModals - Reported Speech - ConditionalsTOEIC Grammar and Vocabulary ReviewOther quiz:
Vocabulary › View‘Identity’ is an example of what?
A. theme
B. verb
C. motif
D. alliteration
Grammar and Sentence Structure › View
. Choose the correct past perfect construction:
A. When she was young, she already finish school
B. When she was young, she have finished school
C. When she was young, she had finished school
D. When she was young, she had finish school
Vocabulary › ViewI’m going to _______________ my old clothes to the charity shop to help those in need.
A. change
B. get by
C. give away
D. run out of
Gerunds › View
Identify the gerund phrase:
After the accident, Laura was afraid of driving her car.
A. After the accident
B. Laura was afriad
C. Afraid of driving
D. driving her car
