As long as I can remember, ___________I called, his wife would answer the phone.

题干

A：however

B：whenever

C：whatever

D：whichever

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B

尿素是一种重要的农业肥料，但若不经细菌的分解，就不能很好地被植物利用．生活在土壤中的微生物种类和数量繁多，同学们设计了以下实验来探究土壤中微生物对尿素的分解作用，并成功筛选到能高效降解尿素的细菌（目的菌）．培养基成分如下表所示．

回答问题

Our Trip to Yibin City
When	On Friday.
How	We will go there 1.
What	But you will need to bring 2 .
Where	Then in the afternoon we will go to 3.
What time	⑴Now please remember that the bus will leave right at 4 . ⑵Tell your parents we'll be back at school 5.