He will never forget the time ______ he began to learn French（）
A. at when
B. when
C. at that
D. which
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Some of the roads were flooded, ______ makes our journey more difficult（）
A. that
B. it
C. which
D. who
The children said__ they____ themselves very much（）
A. if; enjoy
B. why; enjoyed
C. where; enjoy
D. that; enjoyed
She heard a terrible noise, ______ brought her heart into her mouth（）
A. it
B. which
C. this
D. that
The building ______ roof we can see from here is a hotel（）
A. which
B. that
C. that’s
D. whose
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