a rail that prevents people from falling off or being hit by something.
A. unforeseen
B. reversed
C. guard rail
D. mobility

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Modals, Conditionals, and Clauses- Defining, Non-definingPassive with ModalsSocial Media VocabularyUsed to - Would - TensesPresent Continuous TensePrepositions & Modal VerbsPersonal Pronouns and VerbPast Simple & Past ContinuousGrammar & VocabPresent Perfect and Present Perfect ContinuousOther quiz:
Tenses › View. She usually ______ (wake up) at 7 AM.
A. wakes up
B. is waking up
C. has woken up
D. has been waking up
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My jeans have got four _________ .
A. sleeves
B. pictures
C. pockets
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Modal Verbs and Conditionals › ViewYou __________ forget to take your medicine.
A. mustn’t
B. ought not
C. don’t have to
D. can’t
Grammar › View
Which is the correct way to write the following sentence?
Elmyra could work on her homework or she could play with her pet mice.
_
A. Elmyra could work on her homework or she could play with her pet, mice.
B. Elmyra could work on her homework, or she could play with her pet mice.
C. Elmyra could work on her homework or, she could play with her pet mice.
D. Elmyra could work on her homework or she could play with her pet mice.
