[ 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:
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