Thedoctor____isleavingforAfricanextmonth.

Some concepts may be difficult to grasp chiefly because they may be unfamiliar or _____ideas, opinions which we already hold.

-“Youfinallymadeit,didn'tyou?”

-“Yes，____yourhelp,Iwouldn'thavesucceeded.”

"Thelecturerwasatallthinmanwithwhitehair.""Thenit_______Dr.Fellbecauseheisshortandfat.It_____Dr.Jones;heisthin."

I can still remember the sitting room ____ I used to sit in the evening.