--- What do you think of the book ?--- Oh , excellent . It’s worth __________ a second time .
_____is too hard _____ a good solution to this problem.
Bruce_____ football, but he is on the volleyball team now.
I still remember the museum_______ we visited last year.
— I will take an English test tomorrow. — Oh, really?________!
— On summer nights, the weather is usually hot at night in the south of China. — Yes, so I often go to sleep ______ the window ________.