I know Jonathan quite well and never doubt （） he can do a good job of it.

A．readers how to he popular with people around
B．teenagers how to learn to make a decision for themselves
C．parents how to control and guide their children
D．people how to understand and respect each other

A．the possible widespread unemployment caused by their introduction
B．their use as part of automated production systems
C．the least possible number of operators
D．the production system in steelworks

A．normally contains enough vitamins
B．still needs special provision of vitamins
C．is suitable for losing weight
D．is composed of fruits and vegetables