Features such as height, weight and skin colour ______ from individual to individual and from face to face.
A. vary
B. change
C. alter
D. convert
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You don’t have to write the essay if you don’t want to. It is __________.
A. compulsory
B. suitable
C. optional
D. alternative
This factory is planning to build a new_________ line this year.
A. resemble
B. assembly
C. productive
D. assess
Meat _________much more easily than vegetables.
A. loses
B. numerous
C. weaves
D. decays
In this kind of hotel, there are no _________ rooms.
A. luxury
B. marvelous
C. occasional
D. sulphur