[ Vocabulary and Grammar ]
The expert explained that the upper ______ of the bridge was in very bad condition.
A. building
B. structure
C. foundation
D. roof

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Present Simple and Modal VerbsAuxiliary ModalVerb + InfinitiveFuture Continuous, Future Perfect and Future Perfect ContinuousConjunctions and PrepositionsModal Auxiliaries and To Be VerbsFuture Tense VocabularyConditional SentenceGrammar - Punctuation of SentencesVocabulary and IdiomsOther quiz:
Prepositions › ViewDenver is a big city ______ Colorado (State)
A. In
B. at
C. on
Simple Past Tense › View
They / come / home / on foot.
A. They came home on foot.
B. They come home on foot.
C. They did come home on foot.