1. We’ll have a picnic in the park this Sunday _____ it rains or it’s very cold.A. since B. if C. unless D. until 答案为什么是D?难道是标准答案变得“不标准”?

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1. We’ll have a picnic in the park this Sunday _____ it rains or it’s very cold.A. since      B. if         C. unless       D. until   答案为什么是D?难道是标准答案变得“不标准”?

1. We’ll have a picnic in the park this Sunday _____ it rains or it’s very cold.A. since B. if C. unless D. until 答案为什么是D?难道是标准答案变得“不标准”?
1. We’ll have a picnic in the park this Sunday _____ it rains or it’s very cold.
A. since B. if C. unless D. until 答案为什么是D?难道是标准答案变得“不标准”?

1. We’ll have a picnic in the park this Sunday _____ it rains or it’s very cold.A. since B. if C. unless D. until 答案为什么是D?难道是标准答案变得“不标准”?
应该选C,答案出错也是常有的事

答案为 C unless 除非
A since 既然
B if 如果、是否
Duntil 直到
显然D不符合