Bears often hide themselves in places ________ can’t be found by hunters．
A．in which B．where C．that D．不填
When I turned to the person ________ next to me, I recognized that he was my schoolmate．
A．seating B．being sat C．sit D．seated
Of all the books on the desk, ________ is of any use for our safety．
A．nothing B．no one C．neither D．none
While he was investigating ways to improve the telescope, Newton made ________ discovery which completely changed ________ man’s understanding of color．
A．a; 不填 B．a; the C．不填; the D．the; a
It is reported that the police will soon ________ the case of the two missing children．
A．look upon B．look after C．look into D．look out
Don’t be discouraged．________ things as they are and you’ll enjoy every day of your life．
A．Taking B．To take C．Take D．Taken
