The knee is the joint ______ the thigh bone meets the large bone of the lower leg．
A．when B．where C．which D．that
This library has available _____ you want to borrow for your school．
A．as children’s many books as B．as many children’s books as
C．children’s books as many as D．children’s as many books as
If the dog hadn’t woken us, we wouldn’t have noticed the fire and it _______ to the house next door．
A．could spread B．should have spread
C．would spread D．might have spread
When the man came in, gun in hand, we all stood there, ________．
A．astonished B．astonishing
C．being astonished D．having astonished
If nature does not provide man with the necessary material, it is the laboratory ____ he will turn to for it．
A．where B．that C．which D．what
By the time you have completed the essential training, you _____ exposed to virtually every new feature of the course．
A．are B．will have been C．have been D．will be
