[ Idioms ]
They ran ___ against several problems when they tried to build the bridge in that area.
a. off
b. on
c. up

Random Topics:
Possessive PronounsEs and SAdverbIntermediate Prepositions-ed/-ing Adjectives3rd Person SingularPerfect and Past TensesPast Simple (to be)Gerunds in SentencesPersuasive TextOther quiz:
Present Tenses › ViewEven though he denied what he ____ earlier, he ____ to join us.
A. Said / has accepted
B. Has said / accepted
C. Has said / had accepted
D. Had said / accepted
Grammar › View
____ chemistry lessons at school?
A. Were you enjoying
B. Had you enjoyed
C. Would you enjoy
D. Did you use to enjoy
Subject Verb Agreement › ViewLions___in Africa.
A. live
B. lives
Auxiliaries Verb › View
………………. I have a word with you?
A. Will
B. Shall
C. Can
D. Must