I didn't want ______ stupid but I just stood before my classmates with nothing in my head.
Substances will expand or contract ______ heated or cooled, but this is not the case with water.
You can arrive in Beijing earlier for the meeting __ you don’t mind taking the night train.
The old woman has loved Tom _____ he were her son.
She heard a terrible noise, ___brought her heart into her mouth.
They agreed to rent the house ______ the roof should be repaired.