C．for D．at

　　解析：考查固定短语be content with"对......满意"。故选B项。

　　答案：B

　　11．I know that when he looks at his watch；it's a ________ for us to start the attack.

　　A．sign B．expression

　　C．meaning D．signal

　　解析：句意为：我知道当他看手表的时候就是要我们开始进攻的信号。signal信号，符合题意。故选D项。

　　答案：D

　　12．The car was ________ and knocked into a tree.

　　A．in control B．out of control

　　C．in the control D．under control

　　解析：be out of control失去控制，符合句意。故选B项。

　　答案：B

　　13．In April，thousands of holidaymakers remained ________ abroad due to the volcanic ash cloud.

　　A．sticking B．stuck

　　C．to be stuck D．to have stuck

　　解析：考查过去分词作表语。句意为：四月份，成千上万的度假者由于火山灰的影响而滞留国外。此处remain作系动词，后跟过去分词作表语，表示被动。故选B项。

　　答案：B

　　14．We would rather our daughter ________ at home with us，but it is her choice，and she is not a child any longer.

　　A．would stay B．has stayed

　　C．stayed D．stay

　　解析：考查虚拟语气。would rather后跟宾语从句时，从句谓语动词用过去式表示与现在或将来事实相反，用"had＋过去分词"表示与过去事实相反。根据后一句中的is可知，此处动词应用过去式，故选C项。

　　答案：C

　　15．-I've heard this basketball player is due to retire at the end of the season.

-________，because he is currently having the worst performance.