Cars make our lives easier, ____ they have also made problems for our environment.

1. Cars make our lives easier, ____ they have also made problems for our environment.

A. but B. or C. so D. if

【考点】

表转折关系的连词;

【答案】

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单选题普通

1. He kept on trying, ____ he has never won it.

A. although B. so C. and D. or

单选题容易

2. The beginning of the movie was boring, ____the end was amazing!

A. and B. so C. but D. or

单选题容易

3. Although they feel tired, _______ they still go on working.

A. and B. but C. so D. /

单选题容易