1.In order to improve our standard of living, we have to accelerate production.
A) step up
B) decrease
C) stop
D) control
2.Gas does accumulate in the mines around here.
A) increase
B) spread
C) collect
D) grow
答案:A C
A) step up
B) decrease
C) stop
D) control
2.Gas does accumulate in the mines around here.
A) increase
B) spread
C) collect
D) grow
答案:A C