His teacher is the only one ______ he can turn when he is in trouble.
She heard a terrible noise, ___brought her heart into her mouth.
They agreed to rent the house ______ the roof should be repaired.
The reason ___he didn’t come was ____he was injured.
Mother shut the window ______ she might keep the insects out.
Mr. Herpin is one of the foreign experts who ___in China.