Do you know how to chat(聊天)_____ the Internet?[ ]

___ is really hard ___ them to climb Mount Tai.[ ]

Excuse me. Where is the museum?—–It is quite far. It will take you half ___ hour to go there by _____bus.

Are ________ her parents?

Doing lots of listening practice is one of the secrets _____ becoming a good language learner, [ ]