---- Do you know Tom, ______ father is an engineer?---- Yes, quite well. He ______ be the first to offer me help when I met with problems.
Not until I began to work ____ how much time I had wasted.
I want to be left alone ___ things out.
Before __ the trunk must be checked.
The young Swede was made ___ a lot of practice before the Napoleon’s inspection.
Everybody knows that we should not drink ___ water, or they will get burnt.