Her question was so difficult that I could hardly make any _______ of it at all.
Please keep me informed _________ the changes in case they affect our work.
He insisted that he ________ the bike and therefore __________.
Luckily, the new pills didn’t make my brother’s hair _________.
My classmate regretted ______ me that they had regretted _____ paying a visit to the car show yesterday.
The bike requires _________. She requires the work _________ in ten minutes.