When he saw a wallet on the ground, he ______at once and turned it to the police.
-How do you feel when you watch the national flag go up? -It makes me_____very proud.
—When _______ this stone bridge______ ?—In 1935.
—Where have you _____?—I have _____the teachers’ office.
—Where’s Jill? —She ________ in the office. I saw her there just now.
There used to be a boarding school there, _______?