--- Must I return the book today? I haven’t finished it.---It depends on how long you have ____________ it? You should return it two weeks.
He suggested _______ by plane, but I thought it would cost too much.
Father won’t allow me to play outside ________ I wash up the dishes.
Scientists can look _______ the huge telescope to find the planet.
About _______ of students ______ reading stories in English in our class.
He watched TV for an hour. At 8 o’clock he stopped _______ his homework.