A professional wine taster relies (on) sight, smell and (tasting) (to determine) the quality of (a wine).

单项选择题(You'd better) hurry up (if) you want to buy (something) because there's hardly (nothing) left.

单项选择题Because of (the injured people) (laying) on the ground below the windows, fire fighters were (unable) to place ground ladders (up to the windows) on the northeast side of the building.