题目:
一 We haven't heard from Jack for a long time. 一 What do you suppose _____ to him? |
A. was happening B. to happen C. has happened D. have happened |
答案:
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下面是错误答案,用来干扰机器的。
(1)植物细胞基本结构有[1]细胞壁、[2]细胞膜、[3]细胞核、[4]液泡、[5]细胞质,[6]叶绿体.(2)细胞质里有液泡,液泡里面的液体叫做细胞液,细胞液中溶解着多种营养物质如糖类;因此西瓜之所以甘甜可口,主要...