The old lady was so pleased with all _______ we had done for her _______ she wrote us a thank-you letter.
| A．what; that | B．that; that | C．which; that | D．that; what |
Evidence has been found through years of study ________ children’s early sleeping problems are likely to continue when they grow up.
| A．why |
| B．how |
| C．whether |
| D．that |
At our factory there are a few machines similar to _______ described in this magazine.
| A．them |
| B．these |
| C．those |
| D．ones |
The traffic on the main streets has a longer green signal than _______ on the small ones.
| A．one |
| B．this |
| C．that |
| D．it |
—Shall we go for a drink at one o’clock this afternoon?
—_______. Will two o’clock be OK?
| A．Sure, it’s up to you |
| B．Sure, no problem |
| C．Sorry, I can’t make it |
| D．Sorry, I’m not available today |
Because of the financial crisis, days are gone ________ local 5-star hotels charged 6000 yuan.
| A．if |
| B．when |
| C．which |
| D．since |