I’ve put a cross on the map to show _____ that famous hotel is.

I want to know if your sister will go to the movie. — If your sister　　 , so 　　　.

It is uncertain ______ side effects these weight-loss drugs will bring about, although hundreds of thousands of patients have taken it.

--What did you say just now? --I asked _______.

Do you know where _________ now？