EachyearintheUnitedStates,manyblackteenagers_______ofschool,eitherbecausetheycannotkeepuportheyhavetoworktosupporttheirfamily.
A、gooutWeweretoldthatSuewouldbeidealforthejob,butshe________badlywhenwetalkedtoher.
________theconcerthadbegundidwerealizewhatasplendidshowitwasgoingtobe.
The student found the novel _______. It provided him with so much information about the subject.
When he suddenly ________ up the subject of genetic engineering, there was an embarrassedsilence.
Others argue that since the earth has endured a long string of ice ages in the last two millionto three million years, any warming is ________ to be temporary.
