The water was now two feet deep, making it difficult, if not impossible, _________ the car out.
---Hey, Mr. Smith, you are wanted on ___ phone. -----Who is calling? ----- ___ Mr. Green. I do not know who he is.
Is this the factory ______ my father visited last year.
They are ______ at the _______ news.
Only by working hard , _______ .
The teacher asked me ________.