We ___ to paint the whole house but finished only the front part that day. [ ]

I’m so late, but you cannot imagine_______ great trouble I took to find your house

下列各句中，表达得体的一句是

When I am free on Sunday, I often drop in mygrandparents.

NASAhas made a ________ that our earth has no threat associated with the film 2012which is based on pure myths