24 Fill in if or unless.

1 ...If... you decide to come to the party, give us a call.

2 .............. you give up junk food, you won't lose any weight.

3 .............. you forget your keys, you can use my spare ones.

4 .............. there is a lot of traffic, I'll be home early.

5 .............. they call while I'm out, tell them I'll be back later.

6 .............. she studies hard, she'll pass the exams.

7 .............. he passes his driving test, he can't buy a car.

8 .............. they invite him to the party, he won't go.

9 .............. you find any clues, call me.

10 .............. there is a delay, her train will arrive at 6.

11 ............. they start saving money now, they won't be able to go on holiday next summer.

12 .............. we finish the project before Friday, the boss will be very pleased.

25 Match the items in column a with those in column b in order to make correct type 0 conditional sentences, as in the example.

1 - c. If you put wood in water, it floats.

Column A 1 Put wood in water. 2 Stick a pin in a balloon. 3 Mix washing up liquid with water. 4 Heat butter. 5 Throw a coin into water. 6 Add five and six. 7 Burn rubber.

Column B A It sinks. B It produces black smoke. C It floats. D It makes bubbles. E It bursts. F It melts. G You get eleven.

26 Fill in if or when, then complete the sentences with your own ideas.

1…………………………………. 2…………………………………. 3………………………………….. 4…………………………………. 5…………………………………… 6………………………………….. 7……………………………………. 8………………………………….. 9…………………………………… 10…………………………………..

the train arrives, ......................... it stops raining soon,.......... finish school, .......................... I grow up, ................................. Dad comes home early, ........... I win the gold medal,................ you see a burglary, .................. the sun sets, ............................. I get up tomorrow morning, ..... the weather is nice on Saturday,

2 7 Notice the use of the Present Simple (not will) in the first clause. Put if, when, or as soon as into each box 1-5, and put the verbs in brackets in the correct tense.

Paul Bye, darling. Have a good trip.

Mary Thanks.

I _________(ring) you ……..1……I________ (arrive) at the hotel.

Paul That’s lovely, but remember I’m going out.

Mary Well, …..2…… you_________ (be)

out ….3……. I________(ring), I _______(leave) a message on the answer phone so you know I've arrived safely.

Paul Great. What time do you expect you’ll be

there?

Mary …..4…… the plane________ (arrive) on time, I_________(be) at the hotel at about 10.00. That's 8.00 your time.

Paul All right. And remember. Give me a ring …..5…… you know the time of your

flight back, and I ________(pick)you up.

Mary Thanks, darling. Bye!