Sam _____ some knowledge of the computer just by watching others working on it.
Most of the factories under ___________ have been designed by Chinese engineers.
He is eager to own an iPhone. However, from his _____ look on his face, the price of iPhones must have risen.
You don’t necessarily have to own ______ latest everything but you should have ______ rough idea of what is changing.
— I’m happy that we’ve finally cleared up some problems.— ______.
--Have you finished your experiment report, Jane?--Oh, my God. I’ve _______ forgotten all about that.