It seems as if the sun_____round the earth since it rises in the east and sets in the west.
A、circlesD
“asif”“似乎，好象”，太陽(yáng)并不是繞著地球轉(zhuǎn)，所以后面應(yīng)該與事實(shí)相反的假設(shè)，要用虛擬語(yǔ)氣。需要特別指明的是：“如果是一般的客觀規(guī)律的陳述，則用一般現(xiàn)在時(shí)”。
Ifhe_____thestorekeeper‘sscissors，hewouldhaveforgottentobuyapair.
Thedriverpulled_____atthetrafficlights.
Iwilldotheclearingifyousee_____thelunch.
Itseemsasifthesun_____roundtheearthsinceitrisesintheeastandsetsinthewest.
_____youunderstandthisrule，you‘llhavenodifficultyindealingwithsuchproblems.
