Denny and Alesya live in the United States and have two children. Denny's native tongue is English and Alesya's is Russian, but she is also fluent in English. Alesya speaks to her children exclusively in Russian, and Denny speaks to them only in English. The children are consistently exposed to both English and Russian every day and have been since birth. Research shows that Denny and Alesya's children will:________.