为帮助大家在轻松愉快的氛围中掌握英语基础知识，本网站特提供以下资料，希望会带给你意想不到的收获：
1. If you Jerry Brown until recently， you'd think the photograph on the right was strange.
A. shouldn't contact B. weren't to contact C. didn't contact D. hadn't contacted
2. Scientists think helps some trees to conserve water in the winter.
A. when losing leaves B. leaves are lost C. that losing leaves D. the leaves losing
3. He never hesitates to make criticisms are considered helpful to others.
A. so， that B. so， as C. such， that D. Such， as
4. stereophonic phonograph records， two recordings are made of the same musical performance.
A. Creates B. Created C. The creating of D. To create
5. We'd rather you the account tomorrow.
A. settled B. settle C. would settle D. will settle
6. There was a teapot fashioned like a china duck， out of ____ open mouth the tea was supposed to come.
A. which B. its C. that D. whose
7. There is not a conductor resists the flow of the electrical charges.
A. which B. but C. that D. it