A new product must be _________ before it comes into use.
A. given out B. tried out
C. put out D. made out
If you find yourself ______ no one will help you, please call me.
A. whichB. when
C. whereD. what
A big earthquake hit Ludian in Yunnan, ________ many deaths and injuries and a big loss of property.
A. to cause B. caused
C. causing D. having caused
In my opinion, ________ matters is whether we can win together as a team instead of individuals.
A．how B．it C．that D．what
No student ________ go out of the school campus after 10：00 at night without permission according to the school regulations.
A. shall B. must
C. should D. would
Only after one loses something ________ how precious it is.
A．he will realizeB．will he realize
C．he has realizedD．has he realized
