I would have come to see you earlier, but I __________ too busy.
Theydidn't know _________ to do with themselveswhen the project was finished.
The temperature in spring here can drop __________ below zero.
The meeting __________ three hours last night, which made us very tired.
If you are worried that the tickets will be sold out, you can buy one __________.
—Shallwe go to the art exhibition right away?—__________.