We drew this conclusion on the _______of research and experiments.
Some researchers believe that there is no doubt ____ a cure for AIDS will be found.
______children whose parents had died in the earthquake ____ sent to live with families in other cities.
Much to our ______, John was finally persuaded to join in our travel to the South Pole.
---What did you do in the town last night?---_______ a concert, we also watched a football match at home.
Generally speaking, ______ according to the directions, the drug has no side effect.