[ Vocabulary ]
The company has a computer technician …….. call 24 hours a day.
A. at
B. on
C. in
D. of

Random Topics:
Past PassiveArticles with SubstancesAsking and Giving SuggestionGrammar - Wh QuestionsConjunctions, Prepositions and InterjectionsPresent and Past TensesQuestion TagsHave toAdjectives with -ED and -INGModals for ObligationOther quiz:
Descriptions › ViewThey’re at the office from the morning to night.
A. They’re talkative.
B. They’re nice.
C. They’re serious.
D. They’re hardworking.
Grammar › View
Which is correct?
A. He can buy the book, or he can borrow it from the library.
B. He can buy the book, but he can borrow it from the library.
Prepositions › ViewIt’s hot. I need to take _________ my jacket.
A. on
B. in
C. of
D. off
Grammar › View
Idora ate two bowls of noodles and three buns because she was as hungry as ……… .
A. a lion
B. a wolf
C. a bear
D. an ox
