A. primary
B. alternative
C. instant
D. unique
B 形容词词义辨析。alternative“两者择一的, 供替代的”;alternative energy“新能源; 替代能源”;primary“首要的; 初级的; 基本的”;instant“立即的;即食的”; unique“独一无二的, 少见的;特有的”。
Can you think of the alternatives we would use today?(P37)
() 2. (2010·江苏)
— Why, Jack, you look so tired!
— Well, I __________ the house and I must finish the work tomorrow.
A. was painting
B. will be painting
C. have painted
D. have been painting
D 考查时态。根据后句:and I must finish the work tomorrow可以推断出“动作还将继续”,所以应选D项。
We have_been_excavating layers of ash almost six metres thick…(P38)
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