The car（）halfway for no reason.

单项选择题Probability is the mathematical study of the （）of an event’s occurrence.

A. likelihood
B. desirability
C. predictability
D. malleability

单项选择题The degree of downward slope of a beach depends on its composition of deposits as well as on the action of waves across its surface（）

A. sentiment
B. sediment
C. semester
D. segment