We suggest that they provide an effective warning system to ________ many of the disasters ________.
| A．keep; happening |
| B．prevent; from happening |
| C．stop; from being happened |
| D．prevent; from being happened |
Go __ and you’ll see her working at the desk.
| A．to upstairs | B．upstair | C．to upstair | D．upstairs |
He is not so weak ___.
| A．like she | B．as she | C．as her | D．like her |
Your school is __ mine.
| A．three times as big as | B．three times as bigger as | C．as big as three times | D．as three times big |
It’s the __ job he’s ever done.
| A．bad | B．badly | C．worse | D．worst |
A train can run __ a bus.
| A．so quickly than | B．quickly than | C．as quickly | D．more quickly than |