_____we promise continuous increase in rural incomes _____improve the whole people's well-being．
| A．Only if; we can | B．If only; can we | C．Only if; can we | D．Unless; we can |
．-----It was careless of you to have left the hourse without turning off the gas
-----My god! _______
| A．So were you | B．So was I | C．So did I | D．So I did |
In some countries, _______ are called “public schools” are not owned by the state.
| A．that | B．which |
| C．as | D．what |
“I’m going to the post office.” “_______ you’re there, can you get me some stamps?”
| A．As | B．While |
| C．Because | D．If |
______ you are at home alone, please don’t leave the door open.
| A．While | B．As |
| C．Before | D．How |
_______ you are alone with her, tell her that you like her.
| A．While | B．As |
| C．After | D．How |