Their relationship_______ ups and downs over the past century.
The manager told her_________to post the letters by 3:00 in the afternoon.
Theboy wanted to ride his bicycle in the street, but his mother told him_________
The general ordered all the soldiers _________ alert (警惕的).
Theboss_________ all the employees to work withgreat care.
Theteacher asked us _________so much noise.