I regret (to spend) (so) much money (on) a car (that) I hardly drive in everyday life.

单项选择题The extent (of) the harmful effect was of locoweeds (on) animals (depends) on the soil (that) the plants grow.

单项选择题The president (whom) the bank belongs, promised (to keep) all the board members (informed) of (how) the negotiations were going on.