Question

两题单选，我有答案，请说明理由。

①Not until quite recently____any idea what a cloned sheep was like
A.are working B.will i have C.I didn't have D.i had
②if anyone happens to visit me while i an out____him or her leave a message
A.tell B.get C.have D.ask
请将相关的语法讲一下，要不然这个提问就没什么意义了
纠正个错误，第一题单选改为
A.did i have

Answer 1

1.B not until引起的时间状语置于句首时，句子的主谓部分要倒装，从句部分保持不变。
例如，Not until 1998 did he return to his hometown.直到1998年他才回到家乡。
2.Ctell,ask,get后面均跟to do sth.如tell/ask/get sb to do sth.
而have是have sb do sth.

Answer 2

1. B. Not until 后面接部分倒装，A没主语，CD没倒装
2. C. tell/get/ask sb to do sth.只有have+sb do sth

Answer 3

1. B not until等否定词防在句首，谓语使用倒装
2. C have sb. do sth. = get sb. to do sth.