From his findings, Hay has established some flexible guidelines for parents of identical twins. One suggestion is for parents to __ so that contact with other children will __ accelerate language development.

Not until Alice had a baby of her own __ (她才了解) how hard it was for her mother to have brought up her sister and her on her own.

听力原文：Man: I went on a canoeing course last weekend, rather against my better judgement, because although I enjoy swimming, I thought canoeing might be too difficult. And I was right. I really couldn't get the hang of it. I bet the tutors will remember me: not because I was one of their star students, far from it, but I fell out of the canoe more often than everyone else put together! But even so, I enjoyed it so much that when some of the group signed up to do another course together, in six months' time, I found myself signing up too. I bet the tutors refuse to teach me next timer

You will hear five different people talking about short courses they have attended. For questions 19-23, choose from the list (A-F) what each speaker says about their course. Use the letters only once. There is one extra letter which you de net need to use.

A I was encouraged by the teachers to continue developing my skill.

B I learnt something about the subject that I hadn't expected.

C I preferred the social life to the course content.

D I intend doing a similar course again.

E I found out something about myself.

F I thought the course was good value for money.

Speaker 1

He expects an exotic study with freshwater worm from the Antarctic which can __ to yield results which will help to understand how mirror-image twins develop.

The China Travel Service (or the CTS) (中国旅行社，简称“中旅社”), the first travel service of New China, is now one of the key elements in China's travel industry. It boasts the largest travel service with the most complete and fully-functioning network in the country. Currently the CTS group has over 200 subordinate travel services, 117 hotels, 46 duty free shopping centers and 62 tourist service companies all over China.

Since style. and color are a matter of (person) __ taste, we can not easily remark others' clothes as good or bad.