Zhang Yining has trained continuously for six hours. _____ she is tired out.

Where have you been, Ann? You on the phone just now.

A lot of ads are aimed speciall _____ teenagers.[ ]

Where have you _________ all day? —I came back at noon and I _________ in this room ever since.

Have you decided when to leave for Australia?—Not yet. We _________ set off at the end of this month.