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【判断题】
消除污染源是降低有毒金属元素对食品污染最主要的措施。A.
正确
B.
错误
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】（辽宁卷） 23 ． Susan decided not to work on the program at home because she didn’t wanther parents to know what she __________.
A.
． has done
B.
． had done
C.
． was doing
D.
． is doing
【简答题】3 4 = () 8 =21÷______=______：24=______%．
【单选题】The football player felt extremely _____________ after they won the game.
A.
luck
B.
lucky
C.
luckily
D.
unlucky
【单选题】Susan decided not to work on the program at home because she didn’t want her mother to know what she _____.
A.
has done
B.
had done
C.
was doing
D.
is doing
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