Stamps are usually used _____letters.
#44752
A
to sending
B
to send
C
for send
D
for sent
推荐题目
Old people must be____ politely
#44739
A
spoken to
B
speak to
C
poken
D
spoke
The radio says a wild animal zoo is going to ____ in our city. 
#44930
A
be built
B
built
C
build
D
be building
---It’s difficult for the villagers to cross the river. ---I think a bridge______ over the river.
#44765
A
should be built
B
is being built
C
has been built
D
was built
 Young trees____ quite often.
#44612
A
should water
B
should be water
C
should be watered
D
watered