[单项选择]Since the new technology was introduced last month, we（）in speeding up production.
A. succeed
B. succeeded
C. have succeeded
D. will succeed

[单项选择]You (have) (heard from) him (since) last month, (have) you
A. have
B. heard from
C. since
D. have

[单项选择]What was the trouble with New York last month


A. It has a hard time getting immigrants to the city.
B. Some terrible creatures were discovered in Maryland.
C. The whole Maryland pond was poisoned.
D. Five big northern snakehead were found in Queens.

[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. response
B. reply
C. retort
D. answer