1.请听下面一段独白,回答第17至20小题.
17.In Bruce's opinion,which month is the best time to swim?
A.June.
B.July.
C.August.
18.What did Bruce and his friends do before they went swimming yesterday afternoon?
A.They played football.
B.They did their homework.
C.They surfed the Internet.
19.What did Tom and Jim mostly do that afternoon?
A.They did their homework under the trees near the river.
B.They played football in the river.
C.They played football along the river.
20.What time did they go back home yesterday afternoon?
A.At about six o'clock.
B.At about seven o'clock.
C.At about eight o'clock.