1.The board of the company has decided to ________ its operations to include all aspects of the clothing business.
    A) multiply
    B) lengthen
    C) expand
    D) stretch
    2.His business was very successful, but it was at the ________ of his family life.
    A) consumption
    B) credit
    C) exhaustion
    D) expense
    3.First published in 1927, the charts remain an ________ source for researchers.
    A) identical
    B) indispensable
    C) intelligent
    D) inevitable
    4.Joe is not good at sports, but when it ________ mathematics, he is the best in the class.
    A) comes to
    B) comes up to
    C) comes on to
    D) comes around to
    5.Doctors warned against chewing tobacco as a ________ for smoking.
    A) relief
    B) revival
    C) substitute
    D) succession
    6.When carbon is added to iron in proper ________ the result is steel.
    A) rates
    B) thicknesses
    C) proportions
    D) densities
    7.You should try to ________ your ambition and be more realistic.
    A) reserve
    B) restrain
    C) retain
    D) replace
    第一題：
    multiply:vt. 乘,使相乘;倍增vi. 增加
    lengthen:vt. 加長(zhǎng),使延長(zhǎng)vi. 變長(zhǎng)
    expand:vt. 展開(kāi);擴(kuò)大,擴(kuò)充,發(fā)展膨脹,擴(kuò)張;張開(kāi),展開(kāi),使膨脹,使擴(kuò)張;張開(kāi)
    stretch:n. 伸展,張開(kāi),連綿,一段路,一段時(shí)間a. 可伸縮的,彈性的vt. 伸展,張開(kāi),曲解