---- It is demanded that the letter ___by the end of this week , dad !----I’ll do it immediately . 
#103403
A
should mail
B
was mailed
C
mailed
D
be mailed
推荐题目
Mr. Black________ Shanghai in a few days. Do you know when the earliest plane ________on Sunday? 
#99159
A
leaves for;takes off
B
is leaving for;takes off
C
is leaving for;is taking off
D
leaves for;is taking off
The Tibetans          in the Himalayas for centuries and have adjusted to the conditions at________.
#102472
A
has live; a such great height
B
have live; such a great height
C
has lived; a such great height
D
have lived; such a great height