____ before we depart the day after tomorrow, we should have a wonderful dinner party.
A、HadtheyarrivedD
【句意】如果他們能在我們后天離開之前趕到的話，我們就舉行一次盛大的宴會。
【難點】表示將來不可能發生的事實，常用虛擬語氣，主句的謂語為should+動詞原形(適用于第一人稱主語)或would,could,might+動詞原形(適用于其余人稱主語);而條件句的謂語應該用should+動詞原形，wereto+動詞原形或直接用動詞的過去時(如be改用were)。
Theforeigners_________there,butthey_________thefoodthereatfirst.
All we want to do ______ to find enough water _______the horses.
Ihopeyouwillspendasmuchtimeasyoucan________yourEnglish.
____the center of our planetary system was considered as heresy by the church in the Middle Ages.
California is a land of variety and contrast. Almost every type of physical land feature ， sort of arctic ice fields and tropical jungles can be found within its borders. Sharply contrasting types of land often lie very close to one another. People living in Bakersfield ， for instance，can visit the Pacific Ocean and the coastal plain ， the fertile San Joaquin Valley ， the arid Mojave Desert ， and the high Sierra Nevada， all within a radius of about 100 miles. In other areas it is possible to go snow skiing in the morning and surfing in the evening of the same day ， without having to travel long distance. Contrast abounds in California. The highest point in the United States (outside Alaska ) is in California ， and so is the lowest point (including Alaska )。 Mount Whitney ， 14，494 feet above sea level，is separated from Death Valley ， 282 feet below sea level，by a distance of only 100 miles. The two areas have a difference in altitude of almost three miles. California has deep ， clear mountain lakes like Lake Tahoe ， the deepest in the country， but it also has shallow， salty desert lakes. It has Lake Tulainyo ， 12，020 feet above sea level， and the lowest lake in the country ， the Salton Sea， 236 feet below sea level. Some of its lakes ， like Owens Lake in Death Valley ， are not lakes at all： they are dried up lake beds. In addition to mountains ，lakes， valleys，deserts， and plateaus，California has its Pacific coastline， stretching longer than the coastlines of Oregon and Washington combined.
1. Which of the following is the lowest point in the United States?
A. Lake Tulainyo B. Mojave desert C. Death Valley D. The Salton Sea
2. Where is the highest point in the United States located ?
A. Lake Tahoe.
B. Sierra Nevada. C. Mount Whitney.
D. Alaska.
3. How far away is Death Valley from Mount Whitney?
A. About 3 miles.
D. 14，494 feet.
4. Which of the following is NOT mentioned in the passage as being within a radius ofabout 100 miles of Bakersfield ?
A. The Pacific Ocean.
B. San Joaquin Valley.
C. Mojave Desert.
D. Oregon andWashington.
5. Which statement best demonstrates that California is a land of variety and contrast ?
A. The highest lake in California is Lake Tulainyo.
B. It is possible to go surfing and snow skiing in some parts of California without having totravel long distance.
C. Sierra Nevada， San Joaquin Valley， Mojave Desert and the Pacific Ocean all lie withina radius of about 100 miles.
D. Owens Lake ， in Death Valley ， is not really a lake at all.
