A．mineralB．mineC．minefieldD．minelayer
A. mineral
B. mine
C. minefield
D. minelayer
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From the first paragraph, we learn that in old days the most important farming power was______.
A. livestock
B. farmers
C. machines
D. extra labourers
A．come toB．come overC．come acrossD．come back up to
A. come to
B. come over
C. come across
D. come back up to
According to the passage all the followings are true EXCEPT______.
A. she graduated from high school
B. she graduated from college
C. she has got her bachelor's degree
D. she teaches five periods for a school day
A．HoweverB．GraduallyC．MoreoverD．Though
A. However
B. Gradually
C. Moreover
D. Though
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