With our knowledge _________ practice, we can make contributions to our society.
| A．to base on | B．basing on | C．based on | D．base on |
The snow _____ to end at midnight and change to rain in the east as warm air is pushed in by dawn Monday.
| A．is expecting | B．is expected |
| C．has expected | D．had been expected |
Nowadays everything strange is ________ strange. That is to say, any unexpected thing is possible to happen.
| A．something | B．anything |
| C．nothing | D．everything |
These two areas are similar ________ they both have a high rainfall during this season.
| A．to that | B．besides that |
| C．in that | D．except that |
When you go outing with your sisters, you must see to ________ that they are safe.
| A．everything | B．it | C．them | D．yourself |
A model or an experiment in a science class can help students see things which would ______ remain hidden.
| A．otherwise | B．still |
| C．thus | D．therefore |