18．T appreciate that it's not easy for you, but you ______ try to get here on time．
| A．may | B．must | C．will | D．Can |
Who do you think is the right person to ________ the task?
| A．undergo | B．undertake | C．understand | D．underline |
He transplanted the young tree to the park ____it was the best time for it .
| A．where | B．when | C．what | D．that |
—It is a lovely day ,isn`t it ?
— yes,______?
| A．,isn`t it ? | B．it is | C．it isn`t | D．is it |
I always take something to read when I go to the doctor`s ____I have to wait.
A. in caseB so thatC in orderD as if
－You couldn’t have chosen a better way to solve the issue, I think.
－________________.
| A．Well, nothing much | B．Oh, don’t complain about it |
| C．Sorry, but I’ll find a better one | D．Thanks a lot. |