This math problem is ______ difficult ______ that one. [ ]

It’s said that __________ people died from car accidents in 2011. –How terrible!

David，is that man your Chinese teacher?—It___________ be him．He’s having a meeting．

Where is Lucy?— She isn’t here. She has Beijing.

Excuse me. Do you know the way _____ the park? —Sorry, I don’t know. You can ask the policeman. [ ]