--Haven't you seen Mr. Wilson at the lecture?--Yes, but he had left _________ I could ask him any questions.
#49756
A
when
B
before
C
after
D
as
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If you want to send your recording email, connect the recorder your computer.
#49454
A
by；on
B
from；to
C
by；to
D
in；with
They looked _____ each other and kept their secrets _____ themselves.
#48429
A
for; to
B
at; for
C
at; to
D
out; at