Xi’an is really a fascinating city and we’ve decided to stay for two weeks.
Deeply _____, I thanked him again and again.
_____ 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 now man can land on the moon. A.that B.if C whether D what