[填空题]Laughter is a kind of semiverbalized, social expression of pleasure, developing earlier than speech.

[填空题]Laughter is a kind of semiverbalized, social expression of pleasure, developing earlier than speech.

[填空题]Laughter is a social glue that ______ our relations.

[填空题]What kind of social system does the author suggest in order to solve the problem

[单项选择]A. Laughter is good for health. B. Laughter is terrifying sometimes.
C. Laughter is very comfortable. D. Laughter is good for social communication.

[单项选择]

One of the most difficult things to do is to express ideas so clearly in writing or in speaking that they are always perfectly understood. It is hard to express ideas. It is not (36) to find the words (37) express a meaning exactly. (38) is it easy to put words together in (39) a way as to present ideas connectedly (40) in a logical manner. Serious misunderstanding frequently (41) because the wrong word is used (42) because (43) meaning than (44) is intended has been accepted. The person (45) possesses this ability has (46) of the essential qualities (47) a leader. To be able to do so (48) long, hard study and practice.
One has a right (49) expect that education will help him understand better (50) the rest of the world thinks and lives. For (51) , the French, the Russians and the Mexicans may appear to us to have strange customs and (52) of living. Very
A. who
B. where
C. that
D. what