问题
选择题
Kate's dad is getting old. She will go back home to see him _____it is convenient. [ ]
A. because
B. whenever
C. although
D. unless
答案
答案：B
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Kate's dad is getting old. She will go back home to see him _____it is convenient. [ ]
A. because
B. whenever
C. although
D. unless
答案：B