The boy will make a lot of trouble when____________ alone.

The first decade in the 21st century is the one ________ many significant advances are made in China.[ ]

The girl _______ bike you took just now_______ at it

he consequences of the chemicalleaks, the specialists haven’t given final conclusion before they obtainaccurate statistics.

He was ______ the opinion that I should have gotten into coaching because he had and because he had such success with it.