the exploration of the botanical world on a large scale.A．It was not

题型：不详难度：来源：

the exploration of the botanical world on a large scale.

A．It was not until the eighteenth and nineteenth centuries that; had begun

B．It was not until the eighteenth and nineteenth centuries when; began

C．Not until the eighteenth and nineteenth centuries did; begin

D．Until the eighteenth and nineteenth centuries; began

答案

解析

略

举一反三

By no means, I was warned,____to give the password to someone else.

A．was I

B．I was

C．could I

D．I could

题型：不详难度：| 查看答案

So narrow ______ two people couldn’t walk side by side.

A．the street was that	B．was that the street
C．was the street that	D．that was the street

题型：不详难度：| 查看答案

—Don’t you know Li Ming will go abroad?
—____, not until you ____me.

A．No; told

B．Yes; have told

C．No; are telling

D．Yes; told

题型：不详难度：| 查看答案

Not until Betty got to the airport _____ she had lost her tickets.

A．that she realized

B．did she realize

C．where she realized

D．she realized

题型：不详难度：| 查看答案

---Do you go to swim every day?
---No, but I ________.

A．used to do

B．used

C．used to do it so

D．used to

题型：不详难度：| 查看答案