34. When he knocked at the door, my mother was busy ____ supper.
Do let your mother know the truth. She seems to _______ everything.
Only if enough evidence is discovered _______ in the existence of the monster.
His experiences as a volunteer in the quake-hit areas have changed his attitude toward society and _______ influence his future life.
We set off _______ the Three Gorges _______ a beautiful afternoon from Fu Ling.
He missed _______ gold in the high jump, but will get _______ second chance in the long jump.