近来,“有人没活干,有活没人干”的现象在一些地方非常普遍。如果请你据此拟订一研究性学习课题,最恰当的题目应是
30. —I _________ his telephone number. —I have his number, but I _________ to bring my phone book.”
29. He was busy preparing a speech , only _______ once in a while to rise from the table for a tea .
28. Mr. Duncan raised an unnecessary question _______ he then failed to find an answer.
27. I don't like to go swimming with my class even though I like to swim because I am so embarrassed _______ in my bathing suit.
26. It is usually not quite cold in this area in March, but sometimes the temperature ______be very low.