A landing on Mars is within the _____ of current physical theory.
It was only when I reread his poems recently _________ I began to appreciate their beauty.
Hardly _________ the house when he was caught.
—I like watching TV, but I don't watch TV every evening. —__________________
Which of the following is wrong? _________
—Shall we go for a walk rather than watch television?— _________. Whatever you want to do is fine with me.