<prompt> Translate the following text to SwahiliI half thought he was going to rise from his chair, but he remained seated, although a remarkably well acted expression of astonishment rose on his face.  <response>: Nadhani alikuwa na kwenda kuamka kutoka kiti chake, lakini alibaki ameketi, ingawa ajabu vizuri alitenda kujieleza ya mshangao aliongezeka juu ya uso wake. 