It is________to go into the deep forest,for the snakes may make you________.
_____ if he had any difficulties, he made no answer.
_____ hard, you will succeed.
We walked as fast as we could, _____ to catch the 9:30 train.
It is no longer a question nowman can land on the moon. A.that B.if C whether D what
6. White-collar workers across China are becoming____ concerned about the impact of the global financial crisis on their careers.