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.

A.John likes the meeting although he can be late.
B.John is probably late for the meeting.
C.The meeting is likely to be late because of John.
D.John is often late for the meeting, so we don’t like it.

A.To some people, the captain was to blame for the sinking of the Titanic.
B.Some people were blamed for the sinking of the Titanic.
C.The Titanic sank due to the captain’s fault.
D.Some people are blaming to the captain about the sinking of the Titanic.

A.During rush hours, travelling by car is faster than travelling by motorbike.
B.During rush hours, travelling by motorbike is faster than travelling by car.
C.During rush hours, travelling by car is as slow as travelling by motorbike.
D.During rush hours, travelling by motorbike is slower than travelling by car.

A.The policeman asked the woman what did she do the night before.
B.The policeman asked the woman what she had done the night before.
C.The policeman asked the woman what had she done the night before.
D.The policeman asked the woman what she did the night before.

A.Harry might not have sat there waiting for Lucy.
B.Harry needn’t have sat there waiting for Lucy.
C.Harry couldn’t have sat there waiting for Lucy.
D.Harry may not have sat there waiting for Lucy.

A.The fact that he has a weak heart cannot stop him practicing scuba diving.
B.Scuba diving makes him suffer from having a weak heart.
C.The reason why he cannot practice scuba diving is that he has a weak heart.
D.He has a weak heart but he continues to practice scuba diving.