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情态动词考察Could you put me through to 3362541?Oh,you ____ the ex

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情态动词考察
Could you put me through to 3362541?
Oh,you ____ the exchange.You ____the number direct.
A.needn't have called;could have dialed B.didn't have to call;could dial C.needn't call ;would dial D.don't have to;would have dialed
这题为什么选A?B不可以麽?还有其他两个选项也说下
情态动词考察Could you put me through to 3362541?Oh,you ____ the ex
此句意思为：
A.你没必要拨交换机（事实上你已经拨了）.你本来可以直接拨号码（但你没有这样做）.这句有点虚拟语气的意思.
B.过去没必要拨（没拨）,过去可以拨（没拨）.didn't have to=needn't
C.与B相同,过去将会拨
D.现在不必拨(少了call这个单词),将会已经拨了
情态动词考察Could you put me through to 3362541?Oh,you ____ the ex 情态动词是实词吗,比如Could you pass me the salt中的Could? could you ____(possible)help me to solve the problem 情态动词-- Could I have a word with you,mum?--- Oh dear,if you _ The more you put me through 中文意思 Could you please talk to me?(否定句）Could you ____ ____ ____ to Could you _____ me to the Reading Room A.let B.put C.carry.D Excuse me ,please.Could you tell me ____ to get to the East Could you tell me the way to the zoo?Follow me,I happen ____ 选择题Could you help me put these books ___ the Could you tell me ____? ____(could)you help me?