Tobeginsomeactivityisto_____doingit.

Despitehavingreceivedpositivereviewsbyindustrycritics,salesofthedigitalMP3playerhavebeenquite_______(disappoint).

Undernocircumstances_____anythingthatwillbenefitourselvesbutatthesametimeharmtheinterestsof。

Students enrolled as full-time can fully____in the university extracurricular clubs.

_______ terms of quality and service, our company surpasses the competition.