4. 1) If I have lots of homework tonight, i won't play on my computer.

2) If I don't give him a handheld device for his birthday, he will be disappointed.

3) I'll share the images with you if you want them.

4) If you store photos in the cloud, you'll have more space on your PC.

5) You'll find the information you need if you look on the internet.

5. 1) B.

2) D.

3) A.

4) A.

5) D.

6. 1) educational

2) engineer

3) artist

4) mathematician

5) astronomer