从每题所给的A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
21．—Mike , I can’t start the car
—Let me have a look ! Oh , there _____ be something wrong with the engine
A．must B．shall C．can D．will
22．I called up their website , but it didn’t have the information I _______ for .
A．search B．was searching C．have searched D．would search
