1.   She sealed the envelope and stuck on a stamp.

2.   He sealed the envelope and put on a stamp.

3.   Sealing an envelope, she dropped it into the basket of outgoing mail.

4.   Also, do not use large amounts of sticky tape to seal envelopes, as this can render them unusable.

5.   I shall now seal the envelope.

6.   And you have to seal the envelope.

7.   But never before have American voters been required to choose their members of Congress simply by sealing an envelope and sticking it in a box.

8.   Hudson said the cash payments were brought to him in sealed envelopes and that he personally delivered them to Howeth.

9.   It seals the envelope, stamps it and posts it, then empties a clip into the mailbox for good measure.