Don't call the police_________ it's strictly necessary.
a. provided that
b. unless
c. on condition that
b. unless
If you ___ (get) up early, you ___ (be) on time.
If you get up early, you will be on time.
If I ____ (meet) my favourite pop star, I ___ (be) excited a lot.
If I met my favourite pop star, I would be excited a lot.
If I _____ (not / pass) my driving test, my father ____ (not / let) me borrow his car.
If I hadn't passed my driving test, my father wouldn't have let me borrow his car.
Tim didn't see the film so he can't tell you about it.
If Tim had seen the film, he could tell you about it.
I'll talk to the press _____________that they don't reveal my identity.
a. even if
b. unless
c. provided
c. provided
If you_____ (go) to San Francisco, you ___ (see) the Golden Gate Bridge.
If you go to San Francisco, you will see the Golden Gate Bridge.
If I ____ (see) somebody cheating in the test, I ___ (not / report) them to the teacher.
If I saw somebody cheating in the test, I wouldn't report them to the teacher.
If David ___(miss) the bus, he ___ (not / be) in time for the meeting.
If David had missed the bus, he wouldn't have been in time for the meeting.
Jamie is so good at maths that she passed the test without any revising.
If Jamie weren't so good at maths, she wouldn't have passed it without revising.
You should take a jacket __________it's cold when we arrive.
a. in case
b. when
c. on condition that
a. in case
You ______ (not / take) part if you ____ (not / be) ready tomorrow.
You don't take part if you won't be ready tomorrow.
I ___ (can / ask) my friend for advice if I ___ (have) some difficulties.
I could ask my friend for advice if I had some difficulties.
If Sue ___ (close) the window, the robber ____ (can / break) into.
If Sue had closed the window, the robber couldn't have broken into.
I don't know about your party because I never got your message.
If I had got your message, I would know about the party.
a. providing
b. only if
c. as long
c. as long
It ____ (can) be difficult to solve this problem if you _____ (not / learn) this rule.
It can be difficult to solve this problem if you won't learn this rule.
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If he ____ (not / behave) so badly, he _____ (not / be) punished).
If he hadn't behaved so badly, he wouldn't have been punished.
Paul failed his exam so he has to retake it.
If Paul hadn't failed his exam, he wouldn't have to retake it.
I'll lend you money_____________that you pay me back by Friday.
a. in case
b. even if
c. on condition
He ____ (not / be) able to win unless he ___ (practice) a lot.
He won't be able to win unless he practices a lot.
If athletes ____ (take) performance-enhancing drugs, many current records ____ (be) broken.
If athletes took performance-enhancing drugs, many current records would be broken.
If Jack ___ (not / buy) a guitar, he _____ (not / learn) how to play it.
If Jack hadn't bought a guitar, he wouldn't have learnt how to play it.
Lucy rejected their help because she's very proud.
If Lucy weren't so proud, she wouldn't have rejected their help.