I had hardly reached the airport ______ he started for his destination.
A. then
B. when
C. the moment
D. than
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He had a large collection of books, ______ are written in foreign languages.
A. many
B. many ones of which
C. many of which
D. many in which
The book is for the students ______ native language is not Chinese to study in a Chinese college or university.
A. their
B. that
C. whose
D. of whom
Geologists cannot accurately predict ______ the live volcano will erupt again.
A. when
B. which
C. is that
D. and when
______ said under oath was disputed by several other witness.
A. It is the man
B. What the man
C. That the man
D. The man has