____ busy yesterday, or he _______ you with yourexperiment

How do you think of my composition— Almost perfect ________ one spelling mistake

He is rather difficult to make friendswith, but his friendship, _____ is more true than anyone else’s.

If he ___ me his telephone number yesterday, I ___ able to ring him up now.

__ with teens who spend much of their free time in front of TV sets, those who are physically active often have better grades.