David didn’t give up ______ he had failed in ...

David didn’t give up ______ he had failed in the experiment four times．

A. if            B. while         C. though        D.since

九年级英语单项填空困难题查看答案及解析

David didn’t give up ______ he had failed in the experiment four times.

A. if            B. while           C. though        D. since

九年级英语单项填空困难题查看答案及解析

David didn’t give up _________ he had failed in the experiment four times.

A. if　　 B. so　　 C. though　　 D. and

九年级英语单项填空中等难度题查看答案及解析

David doesn’t give up _______ he has failed in the experiment four times.

A. if           B. while        C. though       D. since

九年级英语单项填空困难题查看答案及解析

____he had failed many times, he didn’t give up and succeeded in the end.

A. Unless　　 B. Although　　 C. If　　 D. As

九年级英语单选题简单题查看答案及解析

_______he had failed many times, he didn’t give up and succeeded in the end.

A. Unless　　　　　　　　　 B. Although　　　　　　　 C. If

九年级英语单项填空中等难度题查看答案及解析

_____ Edison had failed many times，he didn't give up and succeed in the end.

A. Unless　　 B. Although　　 C. Because

九年级英语单选题中等难度题查看答案及解析

He failed the exam, ________ he didn't give up.

A.because B.so C.or D.but

九年级英语单选题中等难度题查看答案及解析

He had to give up the plan, ___ he?

A. did　　 B. didn't　　 C. does　　 D. doesn't

九年级英语单选题中等难度题查看答案及解析

Although he failed this time, he didn’t give up and ＿＿＿＿＿＿studying hard..

A. stopped　　 B. continued　　 C. succeeded　　 D. finished

九年级英语单项填空简单题查看答案及解析