The flu is believed _____by viruses that like to reproduce in the cells inside the human nose and throat. [ ]

willit take us to fly to Hainan and willthe trip to Hainan cost us

He was familiar　　the animals.That means these animals were familiar　　　him

What _______ great fun it is to play ______game of basketball after a whole day of study!

Many students believe that the choice of their universities and courses should __________ their own interest.