二、单项填空（共15小题；每小题1分，满分15分）
21．—How did I do on test ?
—Well, actually you didn’t do very well, I wonder if you had had good review of your lessons.
A．a, a B．the , the C．a, the D．the , a
22．—When the next train leave for Boston, Please ?
—Usually at 13:15 but because of a small accident on the line , it at 13:45.
A．does, is going to start B．will, start
C．does, will start D．will, is to start
23．How many these eggs do you want to buy ?
A．dozens of B．dozen of C．dozens D．dozen
