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Themanagersaidthathewouldseekoutmethodsforimprovingthequalityoftheproductand()weshouldworkharderthanbefore.AwhatB/CthatDwhich请问考神马选神马为什么

题目详情
The manager said that he would seek out methods
for improving the quality of the product and () we should work harder than before.
A what
B /
C that
D which
请问考神马 选神马 为什么
▼优质解答
答案和解析
the manager said……后面是两个并列的从句,两个从句前一个that可以省略,后一个that就不可以省略.
所以选C.