—What were you doing when Tom came to see you?—I________on my overcoat and________to visit a friend of mine.
Some of our industrial products may well be said ________ advanced level.
With the plane ________,some passengers on board feel sick and want to throw up.
He always dreams of ________ a chance for him to bring into full play his potential.
.________ bricks,workers press clay into blocks and bake them to the requisite hardness in a kiln.
New ideas sometimes have to wait for years before ________.