The present situation is very complex, so I think it will take me some time to ______ its reality. [ ]

Glass is made ___ all kinds of bottles.

____ do you study for a math test —Istudy math ____ lots of exercises.

Clothing made of man-made fibers has certainadvantages over ______ made of natural fibers like cotton，wool or silk

I don’t like the pattern of the trousers ____, the color doesn’t suit me [ ]