问题
Sometimes,________ we show our gratitude for a person is reflected in the kind of food we serve him or her
A:when
B:whether
C:why
D:how
B:whether
C:why
D:how
正确答案是：
同类题型
that they may eventually reduce the amount of labor needed onconstruction sites by 90 percent
―When did she leave―As if it was 3:30. She for about 2 hours.
Who is knocking at the door?— _______.[ ]
Large quantities of polluted water_____ into the sea so that lots of fish died.
Rodger knows her very well. They by an old friend ten years ago.