A.He was so credulous that all the people around him could easily deceive him.
B.He now admits that some of people around him didn't deserve to be trusted at all.
C.The general opinion is that he made a mistake by having so much faith in the people around him.
D.Nobody thinks that any of the people around him are honest enough to be trusted.

A.Employees need to wear their official uniforms only when in company-owned buildings.
B.When at the workplace, employees must wear clothing accordance with company regulations.
C.It is preferred that workers wear their best clothes when they visit the office.
D.It is better if workers put on their uniforms before they get to work, as this is more appropriate.

A.These people didn't come to the meeting because their car broke down.
B.These people came to the meeting late because their car broke down.
C.These people were late for the meeting because they didn't pick them up.
D.If they had picked up these people, they wouldn't have been late for the meeting.

A.My friend found it easy to pass the driving test.
B.My friend found it impossible to pass the driving test.
C.My friend succeeded in passing the driving test.
D.Passing the driving test shouldn't be too taxing for my friend.

A.Laura took the responsibility for what had happened.
B.Laura didn't mean to tell the truth.
C.Laura apologized to her friend for what had happened.
D.Laura consoled her friend.

A.These novels are too old for my children to read.
B.These novels are not new to my children's reading.
C.My children are too young to read these novels.
D.My children are completely new to these novels.

A.Ag.
B.Cu.
C.Fe.
D.Al.

A.Cu.
B.Mg.
C.K.
D.Al.

A.CO2.
B.H2.
C.CO.
D.N2.

A.C2H5OH.
B.C3H7OH.
C.CH3OH.
D.C3H5OH.