Tom didn’t get ready for his speech, so he was very ______ when he stood in front of class.

Thechildrenwon’tclimbthehillifit_______thisSaturday. [ ]

Some researchers believe that there is no doubt ______ a cure for AIDS will be found.

Help yourself______ some chicken. [ ]

Ann helps Lily with her homework _____ eight o’clock _____ Sunday. [ ]