The only way to succeed at the highest level is to have total belief you are better than anyone else on the sports field.
A：how
B：that
C：which
D：whether
His family__________ all very kind and friendly. His family__________ a happy one.
There are no____(test)this week.
药品是按（ ）来存放的．
已知一个梯形的面积是58平方厘米，它的上底是15厘米，下底是25厘米，它的高是多少厘米？
