— I have just had my watch repaired.
—How much did they ______ you?
| A．pay | B．charge | C．cost | D．spend |
The new technology will make ________possible to grow food with very little water.
| A．it | B．it is |
| C．that | D．that is |
________ matters most in learning English is enough practice.
| A．What | B．Why | C．Where | D．Which |
Before a problem can be solved, it must be obvious ________the problem itself is.(2011·湖南)
| A．what | B．that | C．which | D．why |
I'd like to start my own business–that's ________ I'd do if I had the money.(2011·陕西)
| A．why | B．when | C．which | D．what |
It was never clear ________ the man hadn't reported the accident sooner.(2011·江苏)
| A．that | B．how | C．when | D．why |