问题
__________ you have made a promise, you should carry it out.
A:Once
B:Until
C:For
D:While;
B:Until
C:For
D:While;
正确答案是：
同类题型
How could you be so rude as to walk in here in the middleof my class—_____________
What would you like to order- Let me have a look at the_______, please.
Have you finished reading Gone With the Wind?—No, I_________ my homework all day yesterday
Do you know Uncle Tom is crazy about gardening?—Sure. He ____ his flowers in the garden now.