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上期复习
) S9 o3 P9 u3 O1 U/ a; H% y# R+ ~The workers were glad to hear that their new pay increases were retroactive to the beginning of the previous month.9 ]. n+ |9 Y7 S6 w% F \
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(从过去的某个时间开始起)生效。; P0 F0 H7 [" B9 B: ^. L
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The experts were hired to enhance the computer system so that it could prepare additional types of reports.
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(Hint: Could the computer already do everything needed?)
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2 m* e& _" b8 D请选择true or false:4 _- x8 l. Z/ H7 ^8 G1 }4 m! s* R; Q
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# D; ]& _, E( i% i- M The computer system was removed and a new one installed. " e! K/ z/ ]; g, P4 S4 V
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The original computer system did not do everything the company wanted it to do.
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6 r, e% M: n# [# w答案：
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发表于 2012-8-15 00:34:18
