[单项选择]It ______ ten years since you left me.


A. has
B. had been
C. was
D. is

[单项选择]It ______ ten years since you left me.
A. has
B. had been
C. was
D. is

[单项选择]It ______ years since I saw you last time.
A. was
B. is
C. will be
D. has been

[单项选择]It ______ five years since the famous singer left her hometown.
A. was
B. is
C. has passed
D. had been

[单项选择]It has been ten years since she ______ a nurse.
A. is
B. has been
C. was
D. had been

[单项选择]It's ten years since the scientist ______on his life's work of discovering the valuable chemical element.


A. made for
B. set out
C. took off
D. turned up

[单项选择]It's ten years since the scientist ______ on his life's work of discovering the valuable chemical.
A. made for
B. set out
C. took off
D. turned up

[单项选择]Great changes （） since I left three years ago．
A. took place
B. have taken place
C. will take place

[单项选择]Since there isn't much time left, you can just make the report（）.
A. in detail
B. in short
C. in all
D. in brief

[单项选择]Since there isn't much time left, you can just tell usabout it______.
A. in detail
B. in short
C. in all
D. in brief

[单项选择]（）three years since Nancy had her vacation.
A. It was
B. There was
C. It is
D. There is

[单项选择]Ten years ______ since we met in Beijing.
A. passed
B. passing
C. have passed
D. had passed

[单项选择]

It has been a hundred years since the last big one in California, the 1906 San Francisco earth quake, which helped give (1) to modem earthquake science. A century later, we have a highly successful (2) , called plate tectonics, that explains why 1906-type earthquakes happen--along with why continents drift, mountains rise, and volcanoes (3) the Pacific Rim. Plate tectonics may be one of the (4) triumphs of the human mind, geology’s (5) to biology’s theory of evolution. And yet scientists still can’t say when an earthquake will happen. They can’t even come (6) .
What scientists can do right now is make good maps of fault zones and (7) out which ones are probably due (8) a rupture. And they can make forecasts. A forecast might say that, over a certain number of years, there is a certain (9) of a certain magnitude earthquake in a (10) spot. And that you should fix your house to its
A. by
B. across
C. through
D. among