1.Copernicus maintained that the earth ______ round the sun.

　　A. moves B. moved

　　C. moving D. move

　　2.He was very ______ to go，but he had no choice.

　　A. ready B. willing

　　C. reluctant D. hesitant

　　3.Two-thirds of his property ______ lost in the fire.

　　A. was B. were

　　C. are D. have been

　　4.Remember， nothing hurts concentration ______ reading too slowly.

　　A. rather than B. as well as

　　C. more than D. instead of

　　5.Many people have made a ______ to a physical fitness program so as to maintain good health.

　　A. decision B. commitment

　　C. contribution D. difference

　　參考答案：

　　1.正確答案：A

　　答案解析：表述永恒的真理或客觀規(guī)律用一般現(xiàn)在時，不管主句謂語用什么時態(tài)。而“地球繞著太陽轉(zhuǎn)”是客觀規(guī)律，所以選A.

　　2.正確答案：C

　　答案解析：reluctant“不愿的，勉強的”：“他非常不愿意去，但他別無選擇”，所以，reluctant用于本句合適。Hesitant“躊躇的，猶豫的”;ready“準備好的”;willing“愿意的”。

　　3.正確答案：A

　　答案解析：以分數(shù)限定的名詞做主語時，謂語的單復(fù)數(shù)應(yīng)同該名詞保持一致，而不管分數(shù)是單數(shù)還是復(fù)數(shù)。此句中property(財產(chǎn))是不可數(shù)名詞，故用單數(shù)形式的動詞。

　　4.正確答案：C

　　答案解析：nothing…more than是習慣用語，意思為“什么也比不上…更…”。句子意思為：記住，什么也比不上讀得太慢更傷害注意力的集中了。

　　5.正確答案：B

　　答案解析：本句是帶有不定式短語作目的狀語的簡單句。句意為“許多人都投入了身體鍛煉計劃，以保持良好的健康”。make a commitment“投入，保證”符合題意。