21. “______” is not euphemistic expression in English for lavatory.（ ）
A. Comfort station B. To be patient
C. To relieve oneself D. To wash one’s hands
22．“Tickets, please!” said the guard, putting his head in at the window. In a moment everybody was holding out a ticket.
The example above demonstrates ______ relation between the two sentences.（ ）
A. a temporal B. a causal
C. an additive D. an adversative
23．The British English equivalent for “公立学校” is ______.（ ）
A. public school B. council school
C. private school D. grade school
24. “I’m full” is signified in English culture by ______.（ ）
A. an open hand, palm down, raised to one’s throat
B. one or both open hands lightly patting one’s own stomach
C. a raised open hand, palm forward
D. moving quickly his open hand, palm down, across his throat
