近义词含义比较;
44. there were some _a_ flowers on the table.
a artificial b unnatural c false d unreal
unreal adj. 不真实的（不是真实世界所拥有的，虚幻的）; ends justify means 不择手段;
false adj. 具有欺骗性的，假的，伪造的; false coin/passport/hair，a false tooth/false teeth
unnatural adj. 不自然的，经常用来修饰人的行为举止，表示做作的，矫揉造作的。
artificial adj. 人造人为的 artificial leg 假肢artificial leather 人造皮 genuine leather 真皮
54. when people become unemployed， it is _c_ which is often worse than lack of wages.
a laziness b poverty c idleness d inability
laziness n. 懒惰; poverty n. 贫穷; poor adj. 贫穷的;
idleness n. 无事可做（中性，有时也有贬义含义）; inability n. 没有能力，没有办法。
69. a lot of ants are always invading my kitchen. they are a thorough _a_.
a nuisance b trouble c worry d anxiety
invade 进攻，侵略; nuisance n. （具体的）令人讨厌的东西; trouble n. 烦恼，麻烦，问题;
worry n. 担心，发愁; anxiety n. 焦虑。 what a nuisance. 真是烦。