It’s too hot. Would you mind ______ the window—_______. Please do it now.

With international ______ and education exchangesincreasing every year, the number of Chinese students studying abroad hasincreased rapidly.

e out of ______ habit, not for ______pleasure; for I have been in the habit for more than twenty years．

In our library there a number of books, and in these years the number of them growing larger and larger.

―Have you worked out when the final payment is _______?―Early next month.