The lecture which lasted about three hours was so tedious that the audience ____ (忍不住打哈欠).

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.

The doorman politely requested she __ (be) quiet in the building.

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.

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.

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