Two kilograms ______ too heavy for a sick man.

Laying eggs ____  the ant queen’s full-time job.

_______your father and mother both teachers?

 Many a student ________ failed in the biology exam，and Tom is the only one of them who ________ decided to give up the course.

Petroleum(石油), along with fuel gas, ________ in price. Thus a larger amount of money __________ spent on transportation.