It was not until she had arrived home _______ her appointment with the doctor.
| A.when she remembered | B.and she remembered | 
| C.did she remember | D.that she remembered | 
I don't doubt ______ he will pass the tomorrow’s exam.
| A.that | B.whether | C.if | D.which | 
We were ______ on our way to the airport because of the heavy snow.
| A.held up | B.held out | C.held on | D.held with | 
______ all the required papers, he didn’t answer the questions fluently in class.
| A.Having not read | B.Not having read | C.Not read | D.Not to read | 
When he reached the final line,everyone_____laughing.
| A.burst into | B.burst out | C.burst up | D.broke out | 
The two elderly sisters, ____ so long, held each other.
| A.being separated | B.having been separated | 
| C.to be separated | D.had been separated |