31. Fresh milk _____ in the fridge, or it will go bad.
A
may keep
B
may be kept
C
must keep
D
must be kept
22. You ______ worry about me. I’ve decided to join a local health club.
33.The driver was really careless, otherwise the traffic accident ______.
34. If Julia had practised hard enough last night, she _____ more confident on the stage now.
句意:鲜奶必须保存在冰箱里,否则就会变质。根据句意可知选D。
情态动词
判断结构
抓不住要点
容易