The medicine works more effectively _______ you drink some hot water after taking it.
A．as B．until C．although D．if
--- Is it going to rain tomorrow?
--- I’m afraid _______.
A．so B．this C．to D．that
He did not regret saying what he did but felt that he ______ it differently.
A．could express B．would express C．could have expressed D．must have expressed
The old man came ______ to the railway station, only ______ the train was slowly pulling out of the station.
A．and ran; found B．running; finding C．running; to find D．to run; finding
Now that there is much difficulty in finding a satisfying job, why don’t you do a ______ job to support you for the time being?
A．temporary B．contemporary C．permanent D．essential
Seeing the chemical ________ to the sunlight, Mr. Lee warned the workers to be careful when dealing with it.
A．to expose B．exposing C．exposed D．being exposed
