Ex. 1

1. gadgets

2. online

3. traffic jams

4. message

5. virtual

Ex. 2

1. is going to fall

2. will be

3. am tidying

4. will help

5. have

Ex. 3

1. mix

2. doesn’t  

3. will meet

4. don’t  

5. calls

Ex. 4

1. b) up

2. a) after

3. c) useful

4. c) button

5. a) Send

6. b) take

Ex. 5

1. b)

2. d)  

3. a)  

4. c)