The scientists will succeed in their experiment______ they give up.

题型：单选题题类：常考题难易度：普通

江苏省盐城市盐都区西片2017届九年级下学期英语开学学情检测试卷

A、unless B、if C、after D、until

举一反三

{#blank#}1{#/blank#} you take a bus, you {#blank#}2{#/blank#} {#blank#}3{#/blank#} many interesting people in this city.

What {#blank#}1{#/blank#} do if you {#blank#}2{#/blank#} any money?

You're required to take {#blank#}1{#/blank#} in the P.E. test {#blank#}2{#/blank#} you have a doctor's note.

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