题目内容

My sister and I are used to _______ in the countryside.

A. live
B. lived
C. lliving
D. having lived

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I’m surprised at ______ the house empty．

A. find
B. finding
C. found
D. having found

Ifyouinsiston______something, doitevery day.

A. do
B. doing
C. to do
D. have done

Suppose you aremaking a phone call. Match “what you want to do” with “what you would say”.

测定植物试样中磷含量的一种试验方案是：称取一定质量的含磷试样，处理后将磷沉淀为MgNH4PO4，经过滤、洗涤、再溶解，用EDTA标准溶液滴定溶解后的Mg2+,可选用的指示剂是（）

A. 甲基橙
B. 淀粉
C. 铬黑T
D. 钙指示剂