题目
A.working out
B.having worked out
C.to have been worked out
D.having been worked out
第1题
A new technique ______, the yields as a whole increased by 20 percent.
A.working out
B.having been worked out
C.having worked out
D.to have been worked out
第2题
A new technique ______, the yields as a whole increased by 20 percent.
A.working out
B.having worked out
C.having been worked out
D.to have been worked out
第3题
A new technique ________, the yields as a whole increased by 20 per cent.
A) wording out
B) having worded out
C) having been worded out
D) to have been worded out
第4题
A new technique __________ , the yields as a whole increased by 20 percent.
A. working out
B. having worked out
C. having been worked out
D. to have been worked out
第5题
A.working out
B.having worked out
C.having been worked out
D.to have been worked out
第6题
A new technique ______, the yields as a whole increase by 20 percent.
A.working out
B.having been worked out
C.having worked out
D.to have been worked out
第7题
A new technique______, the yields as a whole increased by 20 percent.
A.working out
B.having worked out
C.having been worked out
D.to have been worked out
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