. It is the test system, _____ the teachers, that is to blame for the heavy burden of middle school students nowadays.
Very loud ______ can make people ill, or even drive them mad.
Look, what Father _____ me when he came home from work!
His _________, his sister's son, was admitted to Beijing University this year.
The clock _____ and we realized it was two o’clock.
My cousin is a sailor. He's doing very well in the _______.