The folk song concert was so well _______ that all the tickets had been sold out on the first day．
A．accepted B．recognized C．received D．promised
—I’ll join the music club ________ Mary is in the club, too．
—You mean if Mary joins the club you’ll do, too．
A．in case B．so that C．now that D．on condition that
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
