Mr. Smith is busy these days ________ a new book on how to develop a child’s reading skill.
#96734
A
working out
B
working on
C
working for
D
working with
推荐题目
Time, ______ correctly, is money in the bank.
#94350
A
to use
B
used
C
using
D
use
I’m going to the supermarket this afternoon. Do you have anything____?
#98817
A
bought
B
to be bought
C
for buying
D
to buy
he food ______ us can last a year or so. 
#97861
A
supplied
B
supplying to 
C
provided for
D
provided with
Two years later, her brother disappeared in the war, never ________ again.
#98708
A
having been heard from
B
to be heard from
C
to hear from
D
being heard