答案:up-to-date
答案:up-to-date
A. A.is completed
B. B.had been completed
C. C.has completed
D. D.had completed
A. A.increase
B. B.to increase
C. C.increased
D. D.increasing
A. A.Why; what
B. B.That; what
C. C.What; what
D. D.When; what
A. A.efficient
B. B.efficiency
C. C.efficiently
D. D.inefficient