They enjoyed fresh watermelon last fall because they watermelon seeds in the spring. A．were plantingB．would plant C．have planted D．had planted 题目和参考答案——青夏教育精英家教网—

题目内容

They enjoyed fresh watermelon last fall because they______ watermelon seeds in the spring.

A．were planting

B．would plant

C．have planted

D．had planted

因为他们去年在春天种下了西瓜籽所以秋天他们品尝到了新鲜的西瓜。根据句意“种西瓜”是在品尝之前，而品尝是过去的事情那么种是在过去的过去所以用过去完成时态，选D

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I really don’t know how to thank you , but for your help, I ______ my lost necklace．

A．couldn’t have found	B．mustn’t have found
C．couldn’t find	D．wouldn’t find

---Mike must have known that.
---No, he ________. How _______ he?

Jane’s pale face suggested that she ill and her mother suggested that she be sent to hospital
without delay.

---Want to ride on the roller coaster?
---No way! I ____ on the roller coaster even if you paid me a million dollars!

A．wouldn’t ride	B．would have ridden
C．would ride	D．wouldn’t have ridden

After her son’s death, the old lady _____ sit at the window, deep in thought．

They urged that measures _______ immediately to protect the endangered animals.

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