______alittleearlier,Iwouldhavecaughtthetrain.
C
本题考查的是 if 引导的虚拟条件句，省略了 if 要把 had 提前。
According to Maslow,self-actualization need excludes _______
Chinaisamountainouscountry.Hills,mountains,andplateauscover_______ofthetotalarea.
Please write a report ________ the above subjects are to be covered.
Which of the following is not mentioned as WTO's objective?
Tourist expenditures have different effects on a destination economy:sales by food vendors to restaurants are _______ effect;while taxi fares and airline ticket sales are _______ effect.