The question is ______ it is worth doing

There is no doubt_______ English is the widely used language all over the world.

The film you’d like to ________ quickly won’tbe ready until tomorrow

It is hard for me to imagine what I would be doing today if I ________ in love,at the age of seven,with the Melinda Cox Library in my hometown.[ ]

If the students don’t understand what their teacher is talking about, he/she hasn’t_________his/her meaning_____________.