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He‘s working hard_____.
B
forfear(that)“惟恐，以免”，引導(dǎo)的從句用虛擬語氣should+動詞原形，should可省略。lest意思及用法類似。
Copernicusmaintainedthattheearth_____roundthesun.
My wallet is nowhere to be found.I_____it when I was on the bus.
“It was very cold testerday. ”
“_____.”
Two-thirds of his property_____lost in the fire.
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