Our teacher is always busy preparing lessons until 11 o’clock at night, ______we students have gone to sleep.
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A
that time
B
by which time
C
by that time
D
which time
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Doris' success lies in the fact _________ she is co-operative and eager to learn from others.
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A
which
B
that
C
when
D
Why
Elbert Einstein, for ______ life had once been very hard, was successful later in science .
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A
whom
B
whose
C
which
D
his
Matt asked __________________.
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A
what was happened to Bill
B
what was the matter with Bill
C
what the matter was with Bill
D
how happened for Bill