北京大學2007年博士研究生入學考試英語試題

Part One: Listening Comprehension略
Part Two: Structure and Written Expression (20%)
Directions: For each question decide which of the four choices given will most suitably complete the sentence if inserted at the place marked. Mark your choices on the ANSWER SHEET.

21．_________ before we leave the day after tomorrow, we should have a wonderful time together.
[A] Had they arrived
[B] Would they arrive