Ex2: 1.ever 2.at 3.during 4.just 5.at 6.yet 7.for 8.in 9.since 10.already

Ex3:

1. Huge waves hit the ship, which caused no serious damage.

2. The truck, which had been repaired three times this month, broke down again.

3. Captain Smith, whose left leg is longer than his right, bravely marched through the night.

4. At dawn when the birds start singing Helen goes out to skate on the frozen lake.

5. Katie, who climbed up to the top of the tree, looked for the best fruit.

6. Mr. Kirk, who was very tired, woke up when he heard a lion roaring.

7. The party arrived at the village where the villagers were waiting for them.

8. The map that they were using was out of date.

9. The compass, which was very old, worked perfectly.

Ex4: 1.gets 2.enter 3.are 4.have had 5.have won 6.have not won 7.want 8.like 9.haven't won 10.have tried 11.have been 12.have 13.live 14.are you living 15.am staying 16.Are you enjoying 17.am practicing 18.get 19.don't have 20.do

Ex5: 1.go through with 2.to set up 3.turns up 4.to take up 5.to get across 6.broke down 7.breaks out 8.carry on 9.had run out of 10.has been preparing for 11.hoped for 12.pay for

Ex6: 1.taking off 2.wild 3.upside down 4.gymnastics 5.dull 6.altitude 7.in order to 8.turn up

Time permitting, teacher can give students several minutes to review this unit themselves.