mid-morning
second-hand
close-up
highly-trained staff
part-time job
seven-screen cinema
North-West
brother-in-law
CD-ROM Library
drop-off
first-year student
first-aid kit
on-line shopping
self-defense
door-to-door
high-energy snack
self-funded
four-course dinner
low-risk investment
note-taking
non-fiction
well-organized
lock-up
fast-food shop
large-scale housing
look-up point (观望点)
wheelchair-access toilet
mid-range
mid-term
double-grill
tape-measure
little-known
数词的考题中，我们还要注意连字符的问题。要记住有连字符的数词词组中，名词不加复数，没有连字符的数词词组，名词有复数。例如：3 years old, 3 year-old都是对的;还要注意的是带有连字符的词组只能做定语修饰后面的名词，不能单独存作为表语。例如：我们可以说my 5-year old brother但不能说my brother is 5-year old.
在同一个单词中有无连字符“-”，有的会发生意义的变化，而有的意义则任然一样。
在一个单词中有无连字符“-”意义不发生变化的，在英语中很多。如：
co-operation ............opoperation(合作)
head-ache .........headache(头痛)
post-man .........postman(邮递员)
re-establish .........reeatablish(重新建立)
to-day .........taday(今天)
to-night .........tonight(今晚)
to-morrow .........tomorrow(明天)
school-house .........schoolhouse(校舍)
但是有些单词用不用连字符，词义就会有差异，这类词特别要引起我们的注意。如：
black-bird(黑色羽毛的鸟)
black bird(山鸟)
re-count(重算、重数)
recount(叙述)
re-collect(重新集合)
recollect(回忆、记忆)
