[单项选择]Since the road is wet this morning, （）last night.
A. it must rain
B. it must be mining
C. it must have rained
D. it must have been rain

[单项选择]Since the road is wet this morning, （） last night.
A. it must rain
B. it must be raining
C. it must have rained
D. it must have been rain

[单项选择]Since the road is wet this morning, ______last night.
A. it must rain
B. it must be mining
C. it must have rained
D. it must have been rain

[单项选择]Since the road is wet this morning, ______ last night.
A. it must rain
B. it has rained
C. it must have rained
D. it must have been rained

[单项选择]Since this road is wet and slippery this morning, it ______ last night.
A. must rain
B. was raining
C. must have rained
D. may rain

[单项选择]The road is wet. It ______ last night.
A. should have rained
B. must have rained
C. could have rained
D. must rain

[单项选择]The road is wet, it ______ rained last night.
A. would have
B. should have
C. could have
D. must have

[单项选择]Since the ground is wet, it ______ last night.

[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