Is it in the factory ______ you visited last week ______ this kind of car is made?

The river ____are covered with trees is very long

My sister was against my suggestion while my brother was _____ it[ ]

It was never clear ________ the man hadn’t reported the accident sooner.(2011·江苏)

s cat is so cute and lovely, but I don’tthink I have enough time to keep ______