Unfortunately, the leading actor is ill. He can’t appear on stage tonight.
A. If the leading actor weren’t ill, he could appear on stage tonight.
B. Provided the leading actor is not ill, he can appear on stage that night.
C. If the leading actor were ill, he could appear on stage tonight.
D. The leading actor is healthy, so he can’t appear on stage tonight.

Random Topics:
Unless If First ConditionalVerb Tenses and Sentence StructureGrammar speak,talk,say,tellModals in the Past - Speculation and DeductionClausesFrequencyAlthough / DespiteModal VerbsTime and CalendarVerb ConjugationOther quiz:
Can/Could › ViewMy sister ___________ swim last year, but now she ___________.
A. can’t/ can
B. couldn’t/ could
C. couldn’t / can
D. can’t/ could
Grammar › View
Han: Where did you go last night?
Dino: …………………………………………
_____
A. I did not go anywhere. I stayed at home.
B. I’m not going anywhere. I’m staying at home.
C. I do not go anywhere. I stay at home.
D. I will not go anywhere. I’ll stay at home.
Grammar and Vocabulary › ViewWhich sentence has future tense?
A. Three girls studied together for the geography test.
B. We always plant pumpkins behind the garage.
C. Sharla’s mother will pick her up after practice.
D. Barry listens to classical music.
Grammar › View
“We have to leave right ______ he yelled.
A. Now!”
B. Now”!
C. Now,”!
D. Now!”,
