---Which book do you think is the most useful to my studies?---________, as long as you read it. In fact, they are out of date.

 On women’s Day,           of the girls was excited because they each           a present.

Peter is my best friend. He often helps ______ with science.

We asked Tom and Mike, but ________ could offer any help．

(2010·全国卷Ⅱ)The doctor thought ________ would be good for you to have a holiday.