—I can't remember those grammar rules!—__________. Practice more.
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 ________.
________ the past,our life is much better.