His mother and her twin sister were adopted from southwest Scotland.
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He started to retrace his family rootsthreeyears ago
A. 对
B. 错
He went to Belfast and found the house where his great-grandfather was born.
A. 对
B. 错
She would like to look into her family history in the future.
A. 对
B. 错
( )命令能用来查找在文件TESTFILE中包含4个字符的行。
A. grep '???? ' TESTFILE
B. grep '…. ' TESTFILE
C. grep '^????$' TESTFILE
D. grep '^….$ ' TESTFILE
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