—How many students in your class are keen on English learning?— _______ great number, and _______ number seems to be increasing.
The new technology will make ________possible to grow food with very little water.
________ 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)