23．This is the second time Nie Haisheng ______ to be the astronaut who took the glorious task.
| A．has been chosen | B．had been chosen | C．was chosen | D．Chose |
The little girl who got lost decided to remainshe was and wait tor her mother.
| A． | where | B． | what | C． | how | D． | who |
So sudden（）that the enemy had no time to escape.
| A． | did the attack | B． | the attack did | C． | was the attack | D． | the attack was |
-------Do you have enough toall your daily expenses?
--------Oh yes, enough and to spare.
| A． | cover | B． | spend | C． | fill | D． | offer |
The number of foreign students attending Chinese universities ________ rising steadily since1990.
| A．is | B．are | C．has been | D．have been |
Whenever I met her, _________ was fairly often, she greeted me with a sweet smile.
| A．who | B．which | C．when | D．that |