749. be not much of(=not a good)不是很好的…

748.make a mess of 弄乱, 打乱

747. be in a mess 乱七八糟, 处境困难

746. (be) at a loss 不知所措

745. be liable to (=be subject to)易于..的,应受(罚)

744. lean against (背)靠着…

743. be involved in (=become connected or concerned) 卷入, 参加

742. improvement in 表示原物有改进,好转

741. be identified with 被视为与…等同

739. guard against (=defend, keep safe)警惕,防止　 guard…against 警卫…防止 740. to one’s horror 令某人感到恐惧的是