Hurry up! Once the concert starts, nobody _______ to enter the concert hall.

 The director wants to make sure no one will solve the mystery until it ________ at the end of the horror film. 

Julie’s father _____ to London last month. He ______ there three times.

Bob is ________ at the map to find where Beihai Park is.

It’s said that scientists have ________ a way to deal with the serious disease