amount of oil was spilt on the East Sea, thecauses of ______ are still under investigation.

Fan, a Chinese actor, finally got to know real success tastes like when he won the prize for Best Actor at the 64th Berlin film festival.

Don’t ______your hope and try again.

out your kind help, we ______ in the experiment.

What do you think of Bill? —There are some things that are not easy to _____; his coldness is one. [ ]