计算：x+2x-1-3x-1=______．

You may know May Day, but do you know Lei Day? Like May Day, Lei Day is also celebrated (庆祝) on May 1st. People wear leis (花环) on this day. A lei is a big circle usually made of flowers . On Lei Day, people give leis to each other. Where do you know this holiday is celebrated? Hawaii, of course! People give leis on birthdays, weddings (婚礼) and as a way to say "I love you". In 1928, a writer, Don Blanding, wrote an article saying that this tradition should become a holiday. Another writer, Grace Tower Warren, thought of the idea of celebrating this day on May 1st and said, "May Day is Lei Day."On this day in 1928, people wore leis and celebrated with music, dancing and a lei-making competition. The next year, Lei Day became a public (公共的) holiday. Today, people still celebrate Lei Day in Hawaii. We hope they all have a happy May Day and a happy Lei Day!

小题1:The underli ned word "circle" can be replaced (替代) by "_________".

A．ring

B．card

C．garden

D．watch小题2:What do people give each other on Lei Day?

A．Clothes.

B．Books.

C．Leis.

D．Cakes.小题3:Lei Day became a public holiday in _____.

A．1928

B．1929

C．1930

D．1931小题4:Which of the following is TRUE according to the passage?

A．Lei Day is on the day after May Day.

B．Lei Day was first celebrated in 1928.

C．Don Blanding said "May Day is Lei Day".

D．People all over the world celebrate Lei Day.小题5:What is the passage about?

A．Lei Day in Hawaii.

B．May Day in Hawaii.

C．How to make a lei.

D．How to celebrate May Day.

芍药汤中黄连是（）

A．君药

B．臣药

C．佐助药

D．反佐药

E．使药

车辆摘解时，两车钩中至少有一个车钩呈（）位置。

A.闭锁

B.开锁

C.全开

接近时要尽量避免与（）正面接触。

上肢与躯干连接的唯一关节是（）

A.肩关节

B.肘关节

C.胸锁关节

D.肩锁关节

E.肋胸关节