B（是模糊数目.其他三个数目都有问题.）
D（On用在具体日期的前面）
C（It's +形容词+to do,句型,做某事如何.）
B（job是可数的,要加a；work是不可数名词.）
D（前一个if是宾语从句,用将来时; 后一个if是状语从句,用现在时表将来的含义.）
1（ ）______people use computers to send ang receive e-mails.
2个回答
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