.---You may find the key to the maths problem on page 107 . ---Ah, it’s so simple . I wonder why I of that .
________ matters most in learning English is enough practice.
Before a problem can be solved, it must be obvious ________the problem itself is.(2011·湖南)
I'd like to start my own business–that's ________ I'd do if I had the money.(2011·陕西)
It was never clear ________ the man hadn't reported the accident sooner.(2011·江苏)
I am afraid he's more of a talker than a doer, which is ________ he never finishes anything.(2011·山东)