Tom likes doing things with his family. He’s learned much from ___ His family help him a lot.

Scientists say it may be five or six years _____ it is possible to test this medicine to human patients.

Why weren’t you on line last night ?—- Oh, my computer was broken and I had to have it ________ .

Thank you for ______me ______his story.[ ]

_____ well you drive, you must drive carefully. [ ]