Look，Tina is waiting ________ the bus stop．

acher talked with Jack, _______ problems waspoor study habits.

Do you have any ________ experience of this type of work?— I am sorry, but I have just graduated from college. [ ]

When she heard the strange news, a ___ look ___ in her face.

amount of oil was spilt on the East Sea, thecauses of ______ are still under investigation.