[ Time Clauses of Future ]
Don’t call the emergency number ______ it’s a real emergency.
A. unless
B. if
C. as soon as

Random Topics:
Passive Voice - Present TensesPresent Tense (Negatives and Questions)Gerunds, Infinitives and ParticiplesGrammar - help/have/let/makeAdjective ending with ED & INGDefinite and Indefinite ArticlesSentence Types and ConjunctionsPast Perfect and Past Perfect Continuous TenseModal SpeculationWH- Question WordsOther quiz:
Present Tenses › ViewNimra has planted roses in her garden.
A. Present Perfect
B. Present Perfect Continuous
C. Present Continuous
D. Present Simple
Past Simple, Past Continuous, Past Perfect, Past Perfect Continuous › View
I heard a knock at the front door so I ____ to answer it.
A. went
B. was going
C. had gone
D. had been going
Identifying Tenses › ViewKathy was doing her homework.
Tom and Leila were watching TV.
I wasn’t doing anything.
A. Past simple
B. Past continuous
C. Past perfect simple
D. Past perfect continuous
Grammar › View
She wishes she ______ more money to buy new computer.
A. has
B. had