All of us found ______ difficult to work out the maths problem.
| A．what | B．that | C．which | D．it |
—I don’t care what people think.
—Well, you _______
| A．could | B．would | C．should | D．might |
Owen wouldn't eat anythinghe cooked it himself
| A． | until | B． | since | C． | unless | D． | while |
- I wonderyou'll water this kind of flower.
--Every other day.
| A． | how often | B． | how long | C． | how soon | D． | how much |
________ many times, he finally understood it. 
| A．Told | B．Telling | C．Having told | D．Having been told |
—Would you please help me with the box?
—_________
| A．Yes, please | B．No, please don’t | C．With pleasure | D．My pleasure |