I don't know________ they have passed the exam.
_______animals are in danger and there will be _______space for them if we do nothing for them.
—____________? —It was sunny and windy.
Tom______half an hour doing his homework and listening to pop music ______him 20 minutes.
We all believe _______,because she is ______honest girl.
He left home ______a cold morning, and I heard that he was coming back _____ the late afternoon.