1) Shortly after the government's new policy was put into effect, the economy of our country began to ______ recovery. 2) We knew well what difficulties we had to ______ in bringing our work to a successful conclusion. 3) She ______ getting injured and never participated in any violent sports games. 4) It looks like this snow will stop the food supplies and we shall be hungry for a time, but we've no choice but to ______. 5) Many trees in this area have ______ to make room for buildings, which has worsened our living enviroment. 6) In order to avoid possible infection by the unkown viruses, researchers are protected ______ with caps, face masks and white gowns. 7) Despite the warm weather the explorers ______ some snow on the northern slope and boiled it for drinking water. 8) Starting bare-handed, you have built up so many steel plants. This is ______ miraculous! 9) ______ we haven't felt the need for any extra hands, but it's only a matter of time. 10) While one cannot choose one's birthplace, one can certainly decide, based on what one has experienced, the best place to ______. 11) Parents who spend time and money teaching their children music, can ______ from a new Canadian study, which shows young children who take music lessons have better memories than their nonmusical peers.