_ _ _ _ _ _ _they’re late again, I’ll be furious.
A. If
B. Unless

Random Topics:
Ordering AdjectivesFuture Continuous TensePassive Voice of TensesFuture Simple TensesVerbsModals and InversionPast Simple & Past ContinuousAdverb Clausesmust/shouldIdentifying TensesOther quiz:
Grammar › ViewWhich compound sentence is correctly punctuated?
A. Will you play volleyball this year or are you going to play basketball instead?
B. Will you play volleyball this year, or are you going to play basketball instead?
C. Will you play volleyball this year or, are you going to play basketball instead?
D. Will you, play volleyball this year or are you going to play basketball instead?
Grammar › View
‘Shall we try the new café in town tomorrow?’
‘Yes, but it … until noon.’
_
A. opens
B. doesn’t open
C. opened
D. is opening
Many vs. Much › View______________children are in the class?
A. How many
B. How much
Tenses › View
While I __________ the room, I found an old photo.
A. cleaned
B. have been cleaning
C. was cleaning