Even if his letter（） tomorrow ，it（） too late to do anything.
C
「句意」即使他的信明天到也无济于事了。
「难点」在条件句中表示现在将来的时间，需要用一般现在时，主句中使用将来时。
To obtain a satisfactory result ， one must apply two（） of paint on a clean surface.
_____enoughtimeandmoney,theresearcherswouldhavebeenabletodiscovermoreinthisfield.
In international matches, prestige is so important that the only thing that matters is to avoid _____.
It was recommended that passengers _____ smoke during the flight.
Our （）sensitivity decreases with age. By age 60 ， most people have lost 40 percent of their ability to smell and 50 percent of their taste buds.